Faint Radio Sources and Star Formation History

Details Faint Radio Sources and Star Formation History Faint Radio Sources and Star Formation History

1999-04-02

arxiv.org/abs/astro-ph/9904036v2

Astrophys.J. 544 (2000) 641-658

Astronomy and Astrophysics

Astrophysics

12 pages, 9 figures, latex using texas.sty, to appear in the CD-ROM Proceedings of the 19th Texas Symposium on Relativistic As

Scientific paper

10.1086/317225

Faint extragalactic radio sources provide important information about the global history of star formation. Sensitive radio observations of the Hubble Deep Field and other fields have found that sub-mJy radio sources are predominantly associated with star formation activity rather than AGN. Radio observations of star forming galaxies have the advantage of being independent of extinction by dust. We use the FIR-radio correlation to compare the radio and FIR backgrounds, and make several conclusions about the star forming galaxies producing the FIR background. We then use the redshift distribution of faint radio sources to determine the evolution of the radio luminosity function, and thus estimate the star formation density as a function of redshift.

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