The Nature of the Faint Radio Source Population and Star Formation History derived from Sub-MJY Surveys

Details The Nature of the Faint Radio Source Population and Star Formation History derived from Sub-MJY Surveys The Nature of the Faint Radio Source Population and Star Formation History derived from Sub-MJY Surveys

Mar 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001ap%26ss.276..791g&link_type=abstract

Astrophysics and Space Science, v. 276, Issue 2/4, p. 791-798 (2001).

Astronomy and Astrophysics

Astrophysics

5

Scientific paper

We present new results on the nature of the faint radio galaxy population obtained from a deep identification study in the Marano Field. This work represents the highest identification fractions attained to date in literature for sub-mJy radio samples. Star-forming galaxies constitute a significant fraction of the optical counterparts of sub-mJy radio sources, although they are not the dominant identification class (as formerly believed). We also present a new determination of the co-moving star formation density from z=0 to z~=0.35 using the radio luminosity function of star-forming galaxies. For the local determination, we used a sample of 231 spiral galaxies taken from the B<=12 Revised Shapley-Ames Catalogue, while for the non-local determination, we used a sample of 87 star-forming galaxies taken from the Benn et al. (1993) sample. The inferred local star formation rate is about twice as great as the H_α estimate, while the intermediate 0.05

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