The cosmic infrared background (CIRB) and the role of the "local environment of galaxies" in the origin of present-day stars

Details The cosmic infrared background (CIRB) and the role of the "local environment of galaxies" in the origin of present-day stars The cosmic infrared background (CIRB) and the role of the "local environment of galaxies" in the origin of present-day stars

2004-03-09

arxiv.org/abs/astro-ph/0403209v1

Astronomy and Astrophysics

Astrophysics

6 pages, 2 figures, invited contribution, to appear in the Proceedings of the ESO/USM/MPE Workshop on "Multiwavelength Mapping

Scientific paper

10.1007/10995020_2

A combination of evidence is presented suggesting that the majority of the stars in today's galaxies were born during a luminous infrared phase (LIRP) triggered by the local environment of galaxies. The CIRB is a fossil record of these LIRPs and therefore reflects the influence of triggered star formation through galaxy-galaxy interactions, including non merging tidal encounters. This scenario, in which galaxies experienced several LIRPs in their history, is consistent with the measured redshift evolution of the cosmic density of star formation rates and of stellar masses of galaxies.

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