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Longer titles found: Spectral line ratios (view), Spectral line shape (view)

searching for Spectral line 177 found (348 total)

NGC 4762 (260 words) [view diff] exact match in snippet view article find links to article

energetic central region. This nucleus is detectable due to its particular spectral line emission, allowing astronomers to measure the composition of the region

Water hole (radio) (271 words) [view diff] exact match in snippet view article

radio telescopes in radio astronomy. The strongest hydroxyl radical spectral line radiates at 18 centimeters, and atomic hydrogen at 21 centimeters (the

Mercury-manganese star (369 words) [view diff] exact match in snippet view article find links to article

(also HgMn star) is a type of chemically peculiar star with a prominent spectral line at 398.4 nm, due to absorption from ionized mercury. These stars are

Robert Woodrow Wilson (778 words) [view diff] exact match in snippet view article find links to article

1970, Wilson led a team that made the first detection of a rotational spectral line of carbon monoxide (CO) in an astronomical object, the Orion Nebula

Explicit symmetry breaking (472 words) [view diff] exact match in snippet view article find links to article

symmetry is approximately respected by the theory. An example is the spectral line splitting in the Zeeman effect, due to a magnetic interaction perturbation

89 Herculis (666 words) [view diff] exact match in snippet view article find links to article

majority is in the outflow. The system shows variable brightness and spectral line profiles. The companion has a very low mass and luminosity and orbits

SPICA (spacecraft) (1,268 words) [view diff] exact match in snippet view article

selected for further development. SPICA would have improved on the spectral line sensitivity of previous missions, the Spitzer and Herschel space telescopes

HD 64760 (455 words) [view diff] exact match in snippet view article find links to article

profiles indicative of strong mass loss and high-velocity winds, but the spectral line profiles are also variable. The variation shows a 2.4 day modulation

Green bean galaxy (1,217 words) [view diff] exact match in snippet view article find links to article

with unusual colors—strongly peaking in the r filter, suggesting a spectral line. In fact, the color is quite similar to the Green Pea galaxies (GPs)

Deuterium NMR (330 words) [view diff] exact match in snippet view article find links to article

orientation due to molecular motions have pronounced effects on the spectral line shape. One example is the use of 2H NMR to study lipid membrane phase

Gart Westerhout (2,376 words) [view diff] exact match in snippet view article find links to article

Galaxy based on observations of radio continuum emissions and 21-cm spectral line radiation that originates in interstellar hydrogen. He emigrated to

Propynylidyne (1,606 words) [view diff] exact match in snippet view article find links to article

from source to source. In 2004, N. Kaifu et al. completed the first spectral line survey toward TMC-1 in the frequency range 8.8-50.0 GHz with the 45-m

John William Nicholson (1,182 words) [view diff] exact match in snippet view article find links to article

also the first to create a nuclear and quantum theory that explains spectral line radiation as electrons descend toward the nucleus, identifying hitherto

Hans R. Griem (443 words) [view diff] exact match in snippet view article find links to article

high temperature plasmas, and for his books on plasma spectroscopy and spectral line broadening in plasmas that have become standard references in the field"

Filtered Rayleigh scattering (66 words) [view diff] exact match in snippet view article find links to article

temperature, and pressure by determining Doppler shift, total intensity, and spectral line shape of laser induced Rayleigh-Brillouin scattering. Forkey, Joseph

Optical decay (411 words) [view diff] exact match in snippet view article find links to article

spectral lines, the decay is almost exponential; then, the profile of the spectral line is determined by the Fourier transform of the exponential decay of the

Walther Ritz (910 words) [view diff] exact match in snippet view article find links to article

in Bonn at the Heinrich Kayser Institute, where he found in potash a spectral line that he had predicted in his dissertation. In November 1903, he was

RX J0852.0−4622 (873 words) [view diff] exact match in snippet view article find links to article

claimed detection by the Compton Gamma Ray Observatory of a gamma ray spectral line of 44Ti which has a half-life of 60 years and therefore seemed to indicate

Ernst Gehrcke (1,623 words) [view diff] no match in snippet view article find links to article

multiplex interferometric spectroscope for precision resolution of spectral-line structures. As an anti-relativist, he was a speaker at an event organized

KAT-7 (313 words) [view diff] case mismatch in snippet view article find links to article

48.8 kHz Yes HI Spectral Line 1 ≥ 33.4 MHz ≤ 4.8 kHz ~ Oct 2012 OH Spectral Line 1 400/32 = 12.5 MHz 1.5 kHz ~ Jun 2012 OH Spectral Line 1 400/128 = 3.1 MHz

Justin-Mirande René Benoit (235 words) [view diff] exact match in snippet view article find links to article

the wavelength determined through interferometry and based on the red spectral line of cadmium. Gardner, I. C. (1955). "Light Waves and Length Standards"

Maser (2,226 words) [view diff] exact match in snippet view article find links to article

inversion and emit radiation at about 22.0 GHz, creating the brightest spectral line in the radio universe. Some water masers also emit radiation from a

Global Oscillations Network Group (870 words) [view diff] exact match in snippet view article find links to article

full-disk images of the Sun in the wavelength of the Hydrogen–α (Hα) spectral line every 20 seconds. These data products are used for research into the

Rydberg–Ritz combination principle (907 words) [view diff] exact match in snippet view article find links to article

related version is that the wavenumber or reciprocal wavelength of each spectral line can be written as the difference of two terms. The simplest example

Excimer laser (2,872 words) [view diff] exact match in snippet view article find links to article

excimer laser development started with the observation of a nascent spectral line narrowing at 176 nm reported in 1971 by Nikolai Basov, V. A. Danilychev

Zeta Puppis (1,995 words) [view diff] exact match in snippet view article find links to article

by the composite emission and absorption profile of the 468.6nm HeII spectral line. The "n" (for nebulous) indicates broadened absorption lines, caused

Bohr model (10,383 words) [view diff] exact match in snippet view article find links to article

spectra was the Rydberg–Ritz combination principle which related atomic spectral line frequencies to differences between 'terms', special frequencies characteristic

KjPn 8 (729 words) [view diff] exact match in snippet view article find links to article

Combining this proper motion with an expansion velocity derived from spectral line profile widths allowed Meaburn to derive a distance to the nebula of

Electron paramagnetic resonance (7,148 words) [view diff] exact match in snippet view article find links to article

unpaired electron with its environment influence the shape of an EPR spectral line. Line shapes can yield information about, for example, rates of chemical

Nançay Radio Observatory (2,369 words) [view diff] exact match in snippet view article find links to article

decimeter waves, including the 21 cm spectral line of neutral atomic hydrogen (HI) and the 18 cm spectral line of the OH radical. The radio wave detector

Alfred Edwin Howard Tutton (663 words) [view diff] exact match in snippet view article find links to article

technique, he was able to verify the use of the wavelength of a specific spectral line as a way of standardizing the imperial yard in 1930. He received an

Sunspot (4,240 words) [view diff] exact match in snippet view article find links to article

examined the structure of starspot regions by analyzing variations in spectral line splitting due to the Zeeman effect; Doppler imaging showed differential

Technetium star (513 words) [view diff] exact match in snippet view article find links to article

than oxygen Mercury-manganese star – Type of star with a prominent spectral line due to absorption from ionized mercury S-type star – Cool giant star

NGC 3974 (217 words) [view diff] exact match in snippet view article find links to article

nucleus that is defined by its spectral line emission which has weakly ionized or neutral atoms, while the spectral line emission from strongly ionized

NGC 5988 (235 words) [view diff] exact match in snippet view article find links to article

nucleus that is defined by its spectral line emission which has weakly ionized or neutral atoms, while the spectral line emission from strongly ionized

NGC 7124 (228 words) [view diff] exact match in snippet view article find links to article

nucleus that is defined by its spectral line emission which has weakly ionized or neutral atoms, while the spectral line emission from strongly ionized

14 Herculis b (723 words) [view diff] case mismatch in snippet view article find links to article

"Extrasolar Planetary Systems or Spectroscopic Binaries? Discrimination using Spectral Line Properties". Archived from the original on 18 May 2011. Retrieved 10

Cyano radical (774 words) [view diff] exact match in snippet view article find links to article

Photodissociation in dense clouds: HCN + hν → •CN + H• H+ 3 + •CN → HCN + H2 A spectral line of •CN was detected in 1938 in the interstellar medium in the ultraviolet

57 Cygni (462 words) [view diff] exact match in snippet view article find links to article

(1973), "The binary system 57 Cygni - apsidal motion and effects of spectral line blending", Monthly Notices of the Royal Astronomical Society, 164 (2):

NGC 7769 (375 words) [view diff] exact match in snippet view article find links to article

nucleus that is defined by its spectral line emission which has weakly ionized or neutral atoms, while the spectral line emission from strongly ionized

1882 in science (793 words) [view diff] exact match in snippet view article find links to article

Palmieri detects helium on Earth for the first time through its D3 spectral line when he analyzes the lava of Mount Vesuvius. Clarence Dutton's Tertiary

NGC 5032 (394 words) [view diff] exact match in snippet view article find links to article

nucleus that is defined by its spectral line emission which has weakly ionized or neutral atoms, while the spectral line emission from strongly ionized

Astronomical spectroscopy (5,318 words) [view diff] exact match in snippet view article find links to article

the 1930s that Walter Grotrian and Bengt Edlén discovered that the spectral line at 530.3 nm was due to highly ionized iron (Fe13+). Other unusual lines

Lya (66 words) [view diff] exact match in snippet view article find links to article

character Lya (given name), a feminine given name Lyman-alpha line (Lyα), a spectral line of hydrogen. This disambiguation page lists articles associated with

BD Camelopardalis (802 words) [view diff] exact match in snippet view article find links to article

time-variable spectral features in the ultraviolet and in the near infrared spectral line of helium. At times BD Cam is the brightest S star in the visible sky

K-line (258 words) [view diff] exact match in snippet view article find links to article

one of two features in spectroscopy: Calcium K line, a Fraunhofer spectral line from ionised calcium K-line (x-ray), an x-ray peak in astronomical spectrometry

Lyman-alpha forest (883 words) [view diff] exact match in snippet view article find links to article

state (n = 1) and the first excited state (n = 2). The Lyman-alpha spectral line has a laboratory wavelength (or rest wavelength) of 1216 Å, which is

2019 revision of the SI (9,060 words) [view diff] exact match in snippet view article find links to article

the prototype of the metre to a certain number of wavelengths of a spectral line of a krypton-86 radiation, making it derivable from universal natural

Deuterium arc lamp (703 words) [view diff] exact match in snippet view article find links to article

excited states in molecular deuterium (D2 or 2H2), causes the effect. The spectral line structure of deuterium does not differ noticeably from that of light

Protonated hydrogen cyanide (1,190 words) [view diff] case mismatch in snippet view article find links to article

Irvine WM, Millar TJ, Ohishi M, Saito S (2000). "A Three-Position Spectral Line Survey of Sagittarius B2 between 218 and 263 GHz. II. Data Analysis"

9 Sagittarii (1,145 words) [view diff] exact match in snippet view article find links to article

2012. Earlier clues such as nonthermal radio emission and periodic spectral line profile variations had prompted the detail search for a companion. The

Coronium (517 words) [view diff] exact match in snippet view article find links to article

the 1930s that Walter Grotrian and Bengt Edlén discovered that the spectral line at 530.3 nm was due to highly ionized iron (Fe13+); other unusual lines

NGC 3610 (737 words) [view diff] case mismatch in snippet view article find links to article

1051/0004-6361/201014429. Howell, Justin H.; et al. (December 2004). "Probing Spectral Line Gradients beyond One Effective Radius in NGC 3610". The Astronomical

Humphreys (184 words) [view diff] exact match in snippet view article find links to article

(surname) Humphreys College, Californian college Humphreys series, spectral line emissions of the hydrogen atom Humphreys (Unigate), characters featured

NGC 828 (250 words) [view diff] exact match in snippet view article find links to article

nucleus that is defined by its spectral line emission which has weakly ionized or neutral atoms, while the spectral line emission from strongly ionized

Molecules in stars (1,307 words) [view diff] exact match in snippet view article find links to article

only come from high in the atmosphere. Also the profile of the atomic spectral line can be distorted due to isotopes or overlaying of other spectral lines

Atomic spectroscopy (1,094 words) [view diff] exact match in snippet view article find links to article

the table below: Cold vapour atomic fluorescence spectroscopy Atomic spectral line McHale, Jeanne L. (2017). Molecular spectroscopy (Second ed.). Boca

Long-slit spectroscopy (457 words) [view diff] exact match in snippet view article find links to article

observing spectral lines, different Doppler shifts can be observed along a given spectral line, leading to velocity profiles of the object along the slit.

Non-achromatic objective (293 words) [view diff] exact match in snippet view article find links to article

telescopes working with narrow spectral lines such as the hydrogen alpha spectral line of 0.6562725 micrometres. They are also used in astrographic telescopes

Tully–Fisher relation (875 words) [view diff] no match in snippet view article find links to article

d^{2}} , where d {\displaystyle d} is its distance from Earth, and the spectral-line width is measured using long-slit spectroscopy. A series of collaborative

List of light sources (1,529 words) [view diff] exact match in snippet view article find links to article

discharge lamp that produces intense white light Hollow-cathode lamp – spectral line source used in physics and chemistryPages displaying wikidata descriptions

NIRSpec (1,723 words) [view diff] case mismatch in snippet view article find links to article

(MOS) NIRSpec in Multi-Object Mode. The image shows the spectra of a Spectral Line Calibration Lamp (Fabry–Perot type) imaged onto the 2 detector Sensor

Hughes–Drever experiment (2,407 words) [view diff] exact match in snippet view article find links to article

should emit a photon of equal frequency, resulting in a single, sharp spectral line. On the other hand, if inertia has a directional dependence, a triplet

Ultraviolet (13,476 words) [view diff] exact match in snippet view article find links to article

nuclei. The long end of the EUV spectrum is set by a prominent He+ spectral line at 30.4 nm. EUV is strongly absorbed by most known materials, but synthesizing

AB8 (star) (2,202 words) [view diff] exact match in snippet view article

lines with a well-defined period of 16.6 days. The relative size of the spectral line Doppler shifts indicates the mass ratio of the two stars, which shows

Interferometry (11,142 words) [view diff] exact match in snippet view article find links to article

etalons are used in narrow bandpass filters capable of selecting a single spectral line for imaging; for example, the H-alpha line or the Ca-K line of the Sun

Indirect detection of dark matter (3,622 words) [view diff] exact match in snippet view article find links to article

5 keV spectral line; the authors of the research, when trying to replicate the results pointing to the existence of the 3.5 keV spectral line failed

Refractive index (9,198 words) [view diff] exact match in snippet view article find links to article

principal index of refraction at yellow spectral line of helium (587.56 nm) and alternatively at a green spectral line of mercury (546.07 nm), called d and

1913 in science (1,418 words) [view diff] exact match in snippet view article find links to article

Stark demonstrates that strong electric fields will split the Balmer spectral line series of hydrogen. Nikolay Anichkov first demonstrates the significance

NGC 6621 (725 words) [view diff] case mismatch in snippet view article find links to article

Bernhard; Surace, Jason A. (3 May 2017). "A Herschel Space Observatory Spectral Line Survey of Local Luminous Infrared Galaxies from 194 to 671 Microns"

Period 1 element (2,701 words) [view diff] exact match in snippet view article find links to article

Pierre Janssen, who first detected the substance as an unknown yellow spectral line signature in light from a solar eclipse. In 1903, large reserves of

HD 117566 (947 words) [view diff] exact match in snippet view article find links to article

temperature calibration for MK-class III giants from high-resolution spectral line-depth ratios". Astronomische Nachrichten. 321 (5–6): 277–305. Bibcode:2000AN

Mendeleev's predicted elements (1,732 words) [view diff] exact match in snippet view article find links to article

identified with coronium, named by association with an unexplained spectral line in the Sun's corona. A faulty calibration gave a wavelength of 531.68 nm

Observational error (2,329 words) [view diff] exact match in snippet view article find links to article

grating, which can then be used to measure the wavelength of any other spectral line. Constant systematic errors are very difficult to deal with as their

Achromatic lens (1,740 words) [view diff] exact match in snippet view article find links to article

{\displaystyle n_{d}} (for the refractive index at the Fraunhofer "d" spectral line wavelength), and the Abbe number V {\displaystyle V} (for the reciprocal

Phi1 Lupi (589 words) [view diff] exact match in snippet view article find links to article

temperature calibration for MK-class III giants from high-resolution spectral line-depth ratios", Astronomische Nachrichten, 321 (5): 277–305, Bibcode:2000AN

Theodor W. Hänsch (1,188 words) [view diff] exact match in snippet view article find links to article

atom has a particularly simple structure. By precisely determining its spectral line, scientists were able to draw conclusions about how valid our fundamental

V1429 Aquilae (1,790 words) [view diff] exact match in snippet view article find links to article

spectral lines and by equally periodic variations in brightness and spectral line profiles. It is unclear whether there are partial eclipses of the larger

Bok Prize (149 words) [view diff] exact match in snippet view article find links to article

Configuration 2005 Patrick Scott Australian National University CO spectral line formation in the sun: convective simulation, line profiles and isotopic

Hydrogen Epoch of Reionization Array (1,202 words) [view diff] exact match in snippet view article find links to article

the 21 cm (1420 MHz) spectral line. Assuming that reionization occurs at z = 6 to 8, one would expect to see this spectral line redshifted into a frequency

Optical cavity (2,250 words) [view diff] exact match in snippet view article find links to article

Kores, C. C.; Geskus, D.; Pollnau, M. (2016). "Fabry-Pérot resonator: spectral line shapes, generic and related Airy distributions, linewidths, finesses

Bohr–Sommerfeld model (1,596 words) [view diff] exact match in snippet view article find links to article

Bohr model and quantum mechanics make the same predictions for the spectral line splitting in the Stark effect. At higher-order perturbations, however

W Ursae Majoris (794 words) [view diff] no match in snippet view article find links to article

1051/0004-6361:20053137 Rucinski, S. M.; Lu, W.-X.; Shi, J. (September 1993), "Spectral-line broadening functions of W UMa-type binaries. III - W UMa", Astronomical

NGC 7674 (961 words) [view diff] case mismatch in snippet view article find links to article

Bernhard; Surace, Jason A. (3 May 2017). "A Herschel Space Observatory Spectral Line Survey of Local Luminous Infrared Galaxies from 194 to 671 Microns"

Yellow supergiant (2,525 words) [view diff] exact match in snippet view article find links to article

spectral types. Modern atmospheric models can accurately match all the spectral line strengths and profiles to give a spectral classification, or even skip

AH Virginis (1,272 words) [view diff] no match in snippet view article find links to article

1134/S1063773712050015, S2CID 119257644. Lu, W. -X.; Rucinski, S. M. (July 1993), "Spectral-Line Broadening Functions of W UMa-Type Binaries. II. AH Vir", Astronomical

New Mexico State Road 6563 (302 words) [view diff] exact match in snippet view article find links to article

NM 5001). It takes its number from the wavelength of the Hydrogen-alpha spectral line (6563 Å) used by scientists at the observatory to study the solar chromosphere

Corona Line (98 words) [view diff] exact match in snippet view article find links to article

former rail line over Corona Pass before the Moffat Tunnel was built A spectral line in the Sun's corona due to highly ionized elements This disambiguation

WR 30a (2,000 words) [view diff] exact match in snippet view article find links to article

colliding winds. The eccentricity is small and the most accurate model of spectral line profile variations during the orbit gives an eccentricity of 0.2. The

Moons of Haumea (1,863 words) [view diff] exact match in snippet view article find links to article

Haumea triple system with HST's NICMOS camera has confirmed that the spectral line at 1.6 μm that indicates the presence of water ice is at least as strong

Orbiting Carbon Observatory (2,662 words) [view diff] exact match in snippet view article find links to article

carbon dioxide or molecular oxygen. The amount of light absorbed in each spectral line increases with the number of molecules along the optical path. OCO's

Emma Vyssotsky (651 words) [view diff] exact match in snippet view article find links to article

(now part of Harvard). There, she worked with Cecilia Payne on the "spectral line contours of hydrogen and ionized calcium throughout the spectral sequence

Spin-1/2 (2,086 words) [view diff] exact match in snippet view article find links to article

important in the discovery of spin is the Zeeman effect, the splitting of a spectral line into several components in the presence of a static magnetic field.

Mark II (radio telescope) (895 words) [view diff] exact match in snippet view article

MERLIN array. It was also planned that the telescope would be used for spectral line work at millimeter wavelengths. However, the upgrade was never approved

Life on Venus (6,133 words) [view diff] exact match in snippet view article find links to article

atmosphere. According to new research announced in January 2021, the spectral line at 266.94 GHz attributed to phosphine in the clouds of Venus was more

Metric system (4,545 words) [view diff] exact match in snippet view article find links to article

that time, the metre was redefined in terms of the wavelength of a spectral line of the krypton-86 atom (krypton-86 being a stable isotope of an inert

ESA Vigil (1,920 words) [view diff] exact match in snippet view article find links to article

additional wavelength point in the vicinity of the magnetically sensitive spectral line. In-situ instruments can be used to monitor the Stream Interaction Regions

Red supergiant (4,290 words) [view diff] exact match in snippet view article find links to article

Betelgeuse pulsating and showing spectral line profile changes (HST UV images)

9-centimeter band (597 words) [view diff] exact match in snippet view article find links to article

3.339 GHz and 3.3458 - 3.3525 GHz are used by radio astronomers for spectral line observations. Amateur stations voluntarily avoid using these frequencies

X-ray spectroscopy (2,659 words) [view diff] exact match in snippet view article find links to article

at specific angles, and since the angular position for every X-ray spectral line is known and recorded, it is easy to find the sample's composition.

Ooty Radio Telescope (1,927 words) [view diff] exact match in snippet view article find links to article

density turbulence in the inner heliosphere. Pulsar timing observations Spectral line observations Wikimedia Commons has media related to Ooty Radio Telescope

Diode-pumped solid-state laser (1,619 words) [view diff] exact match in snippet view article find links to article

by an Nd:YAG crystal to 946 nm light (selecting this non-principal spectral line of neodymium in the same Nd-doped crystals), which is then frequency-doubled

Australian Square Kilometre Array Pathfinder (1,867 words) [view diff] case mismatch in snippet view article find links to article

The First Large Absorption Survey in HI GASKAP: The Galactic ASKAP Spectral Line Survey POSSUM: Polarization Sky Survey of the Universe's Magnetism VAST:

D Line (195 words) [view diff] exact match in snippet view article find links to article

in Port Harcourt, Nigeria D-line (IRC), a command in IRCd D-line, a spectral line of the Fraunhofer lines D Train (disambiguation) This disambiguation

Ellerman bomb (469 words) [view diff] exact match in snippet view article find links to article

ISBN 9789812567871. Libbrecht, Tine (2019). The diagnostic potential of the He I D3 spectral line in the solar atmosphere (PhD thesis). Stockholm University. Watanabe

U Monocerotis (1,345 words) [view diff] exact match in snippet view article find links to article

uncertainty. The properties can be inferred by other methods such as spectral line profiles and atmospheric modelling, but these methods are also uncertain

Anatoly Vlasov (631 words) [view diff] exact match in snippet view article find links to article

statistical physics. In optics he analyzed, partially with Vasily Fursov, spectral line broadening in gases at large densities (1936—1938). A new suggestion

N. R. Pogson (1,453 words) [view diff] exact match in snippet view article find links to article

and making spectrometric studies. He observed and commented on the spectral line associated with Helium, then yet to be discovered. His most notable

Oxocarbon (3,238 words) [view diff] case mismatch in snippet view article find links to article

Drouin J. C. Pearson (2003), Submillimeter, Millimeter, and Microwave Spectral Line Catalog. NASA/JPL, Online version accessed on 2009-07-11. Schröder,

Isotopes of krypton (1,370 words) [view diff] exact match in snippet view article find links to article

definition of the meter was based on the wavelength of the 606 nm (orange) spectral line of a krypton-86 atom. All other radioisotopes of krypton have half-lives

FluoProbes (357 words) [view diff] exact match in snippet view article find links to article

FluoProbes dye Color Light sources (spectral line) FluoProbes 390 violet Diode laser FluoProbes 488 Fluorescein(FITC)/Cy2 cyan Argon laser (488.0nm)

Green Bank Telescope (2,325 words) [view diff] exact match in snippet view article find links to article

Composite image of a spectral line observation of star forming region W51, showing the distribution of ammonia in the region. The image of the telescope

Bärbel Koribalski (371 words) [view diff] exact match in snippet view article find links to article

formation and evolution. Gas kinematics of galaxies using the HI 21-cm spectral line of neutral hydrogen. Radio observations with the Australia Telescope

Hydroxyl radical (3,023 words) [view diff] exact match in snippet view article find links to article

molecules with sub thermal excitation, and can give the opacity of the spectral line, which is a central issue to model the molecular region. Studies based

Blacklight (3,802 words) [view diff] exact match in snippet view article find links to article

phosphors, but rely on the intensified and slightly broadened 350–375 nm spectral line of mercury from high pressure discharge at between 5 and 10 standard

MERLIN (1,857 words) [view diff] exact match in snippet view article find links to article

Radio-loud galaxies, for example Messier 87. Quasars, for example 3C 418. Spectral line observations of Hydroxyl (OH) in interstellar gas clouds. The telescope

PK-4 (ISS experiment) (526 words) [view diff] exact match in snippet view article

S2CID 182324092. Usachev, A. D. (2018). "Influence of dust particles on the neon spectral line intensities at the uniform positive column of dc discharge at the space

V509 Cassiopeiae (2,316 words) [view diff] exact match in snippet view article find links to article

surrounding both stars. It has been suggested that some variations in spectral line profiles are caused by variations in colliding winds or disturbances

Ian Grant (physicist) (1,166 words) [view diff] case mismatch in snippet view article

0188. S2CID 121094462. Grant, I. P.; Peraiah, A. (1 November 1972). "Spectral Line Formation in Extended Stellar Atmospheres". Monthly Notices of the Royal

Super-resolution imaging (3,041 words) [view diff] exact match in snippet view article find links to article

resolution involves the distinction of whether a target, e.g. a star or a spectral line, is single or double, ordinarily requiring separable peaks in the image

Michael Faraday (7,554 words) [view diff] exact match in snippet view article find links to article

technologies Timeline of low-temperature technology Zeeman effect – Spectral line splitting in magnetic field Rao, C.N.R. (2000). Understanding Chemistry

Free spectral range (983 words) [view diff] exact match in snippet view article find links to article

Kores, C. C.; Geskus, D.; Pollnau, M. (2016). "Fabry-Pérot resonator: spectral line shapes, generic and related Airy distributions, linewidths, finesses

Michael Faraday (7,554 words) [view diff] exact match in snippet view article find links to article

technologies Timeline of low-temperature technology Zeeman effect – Spectral line splitting in magnetic field Rao, C.N.R. (2000). Understanding Chemistry

List of discredited substances (289 words) [view diff] exact match in snippet view article find links to article

corona In the 1930s, Walter Grotrian and Bengt Edlén discovered that the spectral line in question was due to highly ionized iron Élan vital Henri Bergson

Luminous blue variable (4,908 words) [view diff] exact match in snippet view article find links to article

P Cygni profile of a spectral line

Oscillator strength (1,233 words) [view diff] exact match in snippet view article find links to article

bottom of the n {\displaystyle n} band into the same state. Atomic spectral line Sum rule in quantum mechanics Electronic band structure Einstein coefficients

Magnesium monohydride (3,946 words) [view diff] exact match in snippet view article find links to article

Liveing and James Dewar are claimed to be the first to make and observe a spectral line from MgH in 1878. However they did not realise what the substance was

Timeline of atomic and subatomic physics (4,332 words) [view diff] exact match in snippet view article find links to article

Stark demonstrates that strong electric fields will split the Balmer spectral line series of hydrogen 1913 Niels Bohr presents his quantum model of the

Cosmic distance ladder (8,113 words) [view diff] exact match in snippet view article find links to article

to this method for finding stellar distances. The calibration of the spectral line strengths has limited accuracy and it requires a correction for interstellar

Brown dwarf (18,161 words) [view diff] exact match in snippet view article find links to article

star is eventually depleted. Therefore, the presence of the lithium spectral line in a candidate brown dwarf is a strong indicator that it is indeed a

Andrew M. Weiner (2,186 words) [view diff] exact match in snippet view article find links to article

Wang, Jian; Chen, Lei; Varghese, Leo Tom; Weiner, Andrew M. (2011). "Spectral line-by-line pulse shaping of on-chip microresonator frequency combs". Nature

James Clerk Maxwell Prize for Plasma Physics (1,099 words) [view diff] exact match in snippet view article find links to article

high temperature plasmas, and for his books on plasma spectroscopy and spectral line broadening in plasmas that have be-come standard references in the field

SW Virginis (1,192 words) [view diff] exact match in snippet view article find links to article

typical size of less than a μm. The shell's thermal (non-maser) mm-wave spectral line emission from carbon monoxide was detected in 1986, and showed that

Isomeric shift (1,780 words) [view diff] exact match in snippet view article find links to article

Atomic spectral line shift

Speed of light (14,707 words) [view diff] exact match in snippet view article find links to article

the metre was redefined in terms of the wavelength of a particular spectral line of krypton-86, and, in 1967, the second was redefined in terms of the

International Bureau of Weights and Measures (5,986 words) [view diff] exact match in snippet view article find links to article

being the first to experimentally link the metre to the wavelength of a spectral line. Albert Abraham Michelson soon took up the idea and improved it. In

AW Ursae Majoris (1,939 words) [view diff] no match in snippet view article find links to article

6079: 1, Bibcode:2013IBVS.6079....1R. Rucinski, S. M. (November 1992), "Spectral-Line Broadening Functions of WUMa-Type Binaries. I. AW UMa", Astronomical

Group 12 element (7,435 words) [view diff] exact match in snippet view article find links to article

Weights and Measures redefined the meter in terms of a red cadmium spectral line (1 m = 1,553,164.13 wavelengths). This definition has since been changed

AB7 (3,077 words) [view diff] exact match in snippet view article find links to article

due to an asymmetric disc around the stars. The relative size of the spectral line Doppler shifts indicates the mass ratio of the two stars, which shows

Magnetometer (9,596 words) [view diff] exact match in snippet view article find links to article

composite and wide spectral lines and helium with the inherently wide spectral line. Magnetometers based on helium-4 excited to its metastable triplet state

Astronomical Institute of Slovak Academy of Sciences (578 words) [view diff] exact match in snippet view article find links to article

processes in the solar photosphere, chromosphere and corona based on spectral line analysis using observational data from the Vacuum Tower Telescope (VTT)

C. V. Raman (14,283 words) [view diff] exact match in snippet view article find links to article

Mandelstam's letter (to Orest Khvolson), the Russian had observed the spectral line on 21 February 1928. Krishnan was not nominated for the Nobel Prize

Hume Cronyn Memorial Observatory (1,727 words) [view diff] exact match in snippet view article find links to article

pioneer; this time in stellar surface imaging through inversion of spectral line-profile variations into abundance and temperature maps of Ap stars.

List of plasma physicists (25 words) [view diff] exact match in snippet view article find links to article

Physics (1990) Hans R. Griem contributions to plasma spectroscopy and spectral line broadening in plasmas, James Clerk Maxwell Prize for Plasma Physics

Stable distribution (6,796 words) [view diff] exact match in snippet view article find links to article

spectroscopy as a general expression for a quasistatically pressure broadened spectral line. The Lévy distribution of solar flare waiting time events (time between

Jan Oort (5,674 words) [view diff] exact match in snippet view article find links to article

detecting the 21-centimeter radio emission from interstellar hydrogen spectral line at radio frequencies. Oort and his colleagues also made the first investigation

Michelson–Morley experiment (10,264 words) [view diff] exact match in snippet view article find links to article

should emit a photon of equal frequency, resulting in a single, sharp spectral line. However, since the nuclear wave functions for different MJ have different

Nuclear magnetic resonance spectroscopy of nucleic acids (1,873 words) [view diff] exact match in snippet view article find links to article

available at that time with low enough molecular weight that the NMR spectral line-widths were practical. The study focussed on the low-field protons because

McCumber relation (2,105 words) [view diff] exact match in snippet view article find links to article

distribution of excitation among sublevels rather than by the shape of the spectral line of each individual transition between sublevels. This distribution is

Arc measurement of Delambre and Méchain (8,018 words) [view diff] exact match in snippet view article find links to article

the first to experimentally link the metre to the wave length of a spectral line. The metre, symbol m, is the SI unit of length. It is defined by taking

Index of physics articles (A) (2,896 words) [view diff] exact match in snippet view article

physics Atomic ratio Atomic scale Atomic scales Atomic spacing Atomic spectral line Atomic theory Atomic units Atomichron Atomics International Atomism

Atmosphere of Venus (10,691 words) [view diff] exact match in snippet view article find links to article

dioxide was contributing only 10% to the tentative signal in phosphine spectral line band. Through studies of the present cloud structure and geology of

Norio Kaifu (1,331 words) [view diff] case mismatch in snippet view article find links to article

Sumiko; Okuda, Michiko; Suzuki, Hiroko (2004). "A 8.8–50 GHZ Complete Spectral Line Survey toward TMC-1 I. Survey Data". Publications of the Astronomical

Solar observation (5,178 words) [view diff] exact match in snippet view article find links to article

activity continued on the far side of the Sun. Sunspot and infrared spectral line measurements made in the latter part of the first decade of the 2000s

High-velocity cloud (3,844 words) [view diff] exact match in snippet view article find links to article

in HVCs exhibit OVI, SiIV, and CIV absorption lines. Most HVCs show spectral line widths that are indicative of a warm, neutral medium for HVCs at about

Ultrafast laser spectroscopy (4,355 words) [view diff] exact match in snippet view article find links to article

(FAD). It is also used to study the bandwidth in semiconductors. Atomic spectral line Attosecond chronoscopy Electronic configuration Terahertz time-domain

Detailed balance (5,752 words) [view diff] exact match in snippet view article find links to article

Balance equation Gibbs sampling Metropolis–Hastings algorithm Atomic spectral line (deduction of the Einstein coefficients) Random walks on graphs Boltzmann

Timeline of United States discoveries (13,854 words) [view diff] exact match in snippet view article find links to article

galaxies Seyfert galaxies are a class of galaxies with nuclei that produce spectral line emission from highly ionized gas, named after Carl Keenan Seyfert, the

HD 222925 (668 words) [view diff] exact match in snippet view article find links to article

star. Wavelength for each element detected by atomic number with each spectral line represented as a dot. A gap between ≈3145 Å and ≈3330 Å reflecting an

History of the metre (8,252 words) [view diff] exact match in snippet view article find links to article

was the first to tie experimentally the metre to the wave length of a spectral line. According to him the standard length might be compared with that of

Rumford Medal (6,743 words) [view diff] exact match in snippet view article find links to article

processes in the interplanetary medium and his prediction of the 21 cm spectral line from interstellar neutral hydrogen" 1966 William Penney British "In

Discovery of the neutron (8,791 words) [view diff] exact match in snippet view article find links to article

magnetic moments of supposed "nuclear electrons" should produce hyperfine spectral line splittings similar to the Zeeman effect, but no such effects were observed

Tensor operator (9,012 words) [view diff] exact match in snippet view article find links to article

respectively. Therefore if we wish to evaluate the intensity of a spectral line as it would be observed, we really have to evaluate 3(2ℓ′+ 1)(2ℓ+ 1)

Henize 70 (653 words) [view diff] exact match in snippet view article find links to article

ratios, indicating that it is not a supernova remnant. Henize 70 has spectral line ratios relatively similar to that of supernova remnants due to having

DYNAS (7,368 words) [view diff] exact match in snippet view article find links to article

averaged over time, at any instant in time the signal has just one spectral line at the instantaneous frequency. So, if you build a time-varying filter

Metre Convention (10,735 words) [view diff] exact match in snippet view article find links to article

being the first to experimentally link the metre to the wavelength of a spectral line. Albert A. Michelson soon took up the idea and improved it. The prototype

History of X-ray astronomy (7,191 words) [view diff] exact match in snippet view article find links to article

supernova remnant in our galaxy, yielded the first detection of an X-ray spectral line, iron K-line emission at ~7 keV. The figure to the right shows 15-second

Supercontinuum (7,160 words) [view diff] exact match in snippet view article find links to article

early publication that "when the maser emission was in a single sharp spectral line, all the Raman emission lines were sharp; whenever the maser emission

IC 1623 (921 words) [view diff] exact match in snippet view article find links to article

the southwestern core is linked to an active galactic nucleus (AGN). Spectral line analysis suggests the presence of a rapidly accreting intermediate-mass

Phase-contrast X-ray imaging (13,663 words) [view diff] exact match in snippet view article find links to article

polychromatic spectrum when the rocking curve is adapted to the K α spectral line radiation of the target material. Due to its high sensitivity to small

Feed-Drum (2,960 words) [view diff] exact match in snippet view article find links to article

merit factor (Q) of their resonance, and provokes a widening of the spectral line—always more marked the more the relative mode is damped. The internal

Sound amplification by stimulated emission of radiation (7,503 words) [view diff] case mismatch in snippet view article find links to article

Kent, A. J. (2010-02-22). "Coherent Terahertz Sound Amplification and Spectral Line Narrowing in a Stark Ladder Superlattice". Physical Review Letters.

Pio Abad (1,129 words) [view diff] exact match in snippet view article find links to article

collection, "the jewels exist not as luxurious accessories but as a spectral line-up that hovers between evidence and effigy, carrying with it the painful

Harold Irving Ewen (1,068 words) [view diff] exact match in snippet view article find links to article

sensitive radiometric systems, and for the codiscovery of the 21-cm spectral line of interstellar hydrogen". Ewen and Purcell were awarded the Beatrice

Karl Martin Menten (954 words) [view diff] exact match in snippet view article find links to article

using the 140 foot radio telescope at Green Bank Observatory. This spectral line became a power tool for studying the formation of massive stars. In

T centre (1,838 words) [view diff] exact match in snippet view article find links to article

symmetry and orientation of luminescent transitions. Stress-dependent spectral line studies have previously suggested that rhombic I (C2v) symmetry is present

Wilhelm Foerster Observatory (1,596 words) [view diff] exact match in snippet view article find links to article

Berlin-Steglitz) for solar observation in the light of the hydrogen spectral line. The Ritchey–Chrétien telescope has a free aperture of 700 mm and a