Extragalactic background light : inventory of light throughout the cosmic history
| Autor: | Kalevi Mattila, Petri Vaisanen |
|---|---|
| Přispěvatelé: | Department of Physics |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Olbers' Paradox
Cosmology and Nongalactic Astrophysics (astro-ph.CO) DWARF GALAXIES media_common.quotation_subject Milky Way Astrophysics::High Energy Astrophysical Phenomena FOS: Physical sciences General Physics and Astronomy Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics UPPER LIMIT 01 natural sciences Galaxy evolution 0103 physical sciences POPULATION-III INTRACLUSTER LIGHT Surface brightness SKY BRIGHTNESS 010306 general physics 010303 astronomy & astrophysics Astrophysics::Galaxy Astrophysics Light of the Night Sky media_common INTERPLANETARY DUST Physics Astrophysics::Instrumentation and Methods for Astrophysics DIFFUSE INTRAHALO LIGHT 8000 ANGSTROM 115 Astronomy Space science Astrophysics - Astrophysics of Galaxies Galaxy Stars Extragalactic background light Sky Astrophysics of Galaxies (astro-ph.GA) Intergalactic travel 1ST DETECTIONS EXPERIMENT SEARCH Halo cosmology Astrophysics - Cosmology and Nongalactic Astrophysics |
| Popis: | The Extragalactic Background Light (EBL) stands for the mean surface brightness of the sky as we would see it from a representative vantage point in the intergalactic space outside of our Milky Way Galaxy. Averaged over the whole 4 pi solid angle it represents the collective light from all luminous matter radiated throughout the cosmic history. Part of the EBL is resolved into galaxies that, with the increasing detecting power of giant telescopes and sensitive detectors, are seen to deeper and deeper limiting magnitudes. This resolved part is now known to contribute a substantial or even the major part of the EBL. There still remains, however, the challenge of finding out to what extent galaxies too faint or too diffuse to be discerned individually, individual stars or emission by gas outside the galaxies, or more speculatively, some hitherto unknown light sources such as decaying elementary particles are accounting for the remaining EBL. We review the recent progress that has been made in the measurement of EBL. The current photometric results suggest that there is, beyond the resolved galaxies, an EBL component that cannot be explained by diffuse galaxy halos or intergalactic stars. Comment: Accepted manuscript of a review article for Contemporary Physics, 31 pages, 11 figures. (E-prints of the published version of the article can be obtained from the authors.) |
| Databáze: | OpenAIRE |
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