A Fossil Record of Galaxy Encounters

The cosmic infrared background (CIRB) is a record of a large fraction of the emission of light by stars and galaxies over time. The bulk of this emission has been resolved by the Infrared Space Observatory camera. The dominant contributors are bright starburst galaxies with redshift z ~ 0.8; that is...

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Veröffentlicht in:	Science (American Association for the Advancement of Science) 2003-04, Vol.300 (5617), p.270-274
Hauptverfasser:	Elbaz, David, Cesarsky, Catherine J.
Format:	Artikel
Sprache:	eng
Schlagworte:	Analysis Astronomy Background radiations Earth, ocean, space Emissions Energy Evolution Exact sciences and technology Far infrared radiation Galactic evolution Galaxies Galaxy formation Infrared radiation Light Red shift Redshift surveys Review Star formation Stars Stars & galaxies Stellar luminosities Stellar systems. Galactic and extragalactic objects and systems. The universe Unidentified sources and radiation outside the solar system Wavelengths
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Beschreibung
Zusammenfassung:	The cosmic infrared background (CIRB) is a record of a large fraction of the emission of light by stars and galaxies over time. The bulk of this emission has been resolved by the Infrared Space Observatory camera. The dominant contributors are bright starburst galaxies with redshift z ~ 0.8; that is, in the same redshift range as the active galactic nuclei responsible for the bulk of the x-ray background. At the longest wavelengths, sources of redshift z ≥ 2 tend to dominate the CIRB. It appears that the majority of present-day stars have been formed in dusty starbursts triggered by galaxy-galaxy interactions and the buildup of large-scale structures.
ISSN:	0036-8075 1095-9203
DOI:	10.1126/science.1081525