The optically-dark side of galaxy formation

Details The optically-dark side of galaxy formation The optically-dark side of galaxy formation

1997-06-10

arxiv.org/abs/astro-ph/9706095v2

Astronomy and Astrophysics

Astrophysics

13 pages, Latex, 3 postscript figures, last revised version on September, the 25th, accepted for publication in Nature

Scientific paper

10.1038/36792

In this letter, we estimate how much starlight was absorbed by dust and released in the infrared during the formation of galaxies. New constraints are set on this so-far hidden history by the recent detection of the Cosmic Infrared Background (CIB) built up from the accumulated light of faint sources (and revisited here). By means of a semi-analytical model of hierarchical galaxy formation, we estimate the population of dust-enshrouded starburst galaxies fitting the CIB. It is argued that a deep ISO survey at 175 micron could already detect these sources and help close the gap in our understanding of the history of light in the Universe.

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