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26 relations: Absorption spectroscopy, Astronomical spectroscopy, Atomic electron transition, Carbon, Damped Lyman-alpha system, Electromagnetic spectrum, Fingerprint, Galaxy, Gunn–Peterson trough, H I region, Helium, Hydrogen, Jan Oort, John N. Bahcall, Lyman series, Lyman-alpha blob, Lyman-alpha emitter, Lyman-break galaxy, Monthly Notices of the Royal Astronomical Society, Quasar, Redshift, Reionization, Silicon, Spectral line, Ultraviolet, Wavelength.
Absorption spectroscopy
Absorption spectroscopy refers to spectroscopic techniques that measure the absorption of radiation, as a function of frequency or wavelength, due to its interaction with a sample.
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Astronomical spectroscopy
Astronomical spectroscopy is the study of astronomy using the techniques of spectroscopy to measure the spectrum of electromagnetic radiation, including visible light and radio, which radiates from stars and other celestial objects.
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Atomic electron transition
Atomic electron transition is a change of an electron from one energy level to another within an atom or artificial atom.
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Carbon
Carbon (from carbo "coal") is a chemical element with symbol C and atomic number 6.
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Damped Lyman-alpha system
Damped Lyman alpha systems or Damped Lyman alpha absorption systems are concentrations of neutral hydrogen gas, detected in the spectra of quasars.
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Electromagnetic spectrum
The electromagnetic spectrum is the range of frequencies (the spectrum) of electromagnetic radiation and their respective wavelengths and photon energies.
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Fingerprint
A fingerprint in its narrow sense is an impression left by the friction ridges of a human finger.
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Galaxy
A galaxy is a gravitationally bound system of stars, stellar remnants, interstellar gas, dust, and dark matter.
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Gunn–Peterson trough
In astronomical spectroscopy, the Gunn–Peterson trough is a feature of the spectra of quasars due to the presence of neutral hydrogen in the Intergalactic Medium (IGM).
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H I region
An HI region or H I region (read H one) is a cloud in the interstellar medium composed of neutral atomic hydrogen (HI), in addition to the local abundance of helium and other elements.
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Helium
Helium (from lit) is a chemical element with symbol He and atomic number 2.
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Hydrogen
Hydrogen is a chemical element with symbol H and atomic number 1.
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Jan Oort
Jan Hendrik Oort (or; 28 April 1900 – 5 November 1992) was a Dutch astronomer who made significant contributions to the understanding of the Milky Way and who was a pioneer in the field of radio astronomy.
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John N. Bahcall
John Norris Bahcall (December 30, 1934 – August 17, 2005) was an American astrophysicist, best known for his contributions to the solar neutrino problem, the development of the Hubble Space Telescope and for his leadership and development of the Institute for Advanced Study in Princeton.
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Lyman series
In physics and chemistry, the Lyman series is a hydrogen spectral series of transitions and resulting ultraviolet emission lines of the hydrogen atom as an electron goes from n ≥ 2 to n.
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Lyman-alpha blob
In astronomy, a Lyman-alpha blob (LAB) is a huge concentration of a gas emitting the Lyman-alpha emission line.
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Lyman-alpha emitter
A Lyman-alpha emitter (LAE) is a type of distant galaxy that emits Lyman-alpha radiation.
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Lyman-break galaxy
Lyman-break galaxies are star-forming galaxies at high redshift that are selected using the differing appearance of the galaxy in several imaging filters due to the position of the Lyman limit.
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Monthly Notices of the Royal Astronomical Society
Monthly Notices of the Royal Astronomical Society (MNRAS) is a peer-reviewed scientific journal covering research in astronomy and astrophysics.
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Quasar
A quasar (also known as a QSO or quasi-stellar object) is an extremely luminous active galactic nucleus (AGN).
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Redshift
In physics, redshift happens when light or other electromagnetic radiation from an object is increased in wavelength, or shifted to the red end of the spectrum.
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Reionization
In the field of Big Bang theory, and cosmology, reionization is the process that caused the matter in the universe to reionize after the lapse of the "dark ages".
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Silicon
Silicon is a chemical element with symbol Si and atomic number 14.
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Spectral line
A spectral line is a dark or bright line in an otherwise uniform and continuous spectrum, resulting from emission or absorption of light in a narrow frequency range, compared with the nearby frequencies.
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Ultraviolet
Ultraviolet (UV) is electromagnetic radiation with a wavelength from 10 nm to 400 nm, shorter than that of visible light but longer than X-rays.
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Wavelength
In physics, the wavelength is the spatial period of a periodic wave—the distance over which the wave's shape repeats.
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Redirects here:
Ly Alpha Forest, Lyman alpha forest, Lyman‐alpha forest.
References
[1] https://en.wikipedia.org/wiki/Lyman-alpha_forest
