Physics
Scientific paper
Jul 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000hst..prop.8682s&link_type=abstract
HST Proposal ID #8682
Physics
Hst Proposal Id #8682 Cosmology
Scientific paper
The observational constraints on the cosmic star formation history is currently among the most active fields in observational cosmology. The most widely used tracer of the comoving volume-averaged star formation rate {SFR} is the UV luminosity density, which early results found to peak at z 1- 2. The apparent identification of the primary epoch of metal production and star formation in the Universe led to intense theoretical and observational interest. Nevertheless, and remarkably for such a fundamental observation, little is known about the history of star formation in the Universe beyond its global average. Also, obscuration corrections are critical, and the UV luminosity is highly sensitive to these dust corrections. The most ideal obscuration-independent starburst selection is the decimetric radio flux, which measures both obscured and unobscured star formation. Here we propose to extend our cycle 8 program of WFPC2 F814W snapshots of sub-mJy starbursts, selected at low radio frequency to avoid AGN and provide a robust SFR conversion. We will greatly extend our luminosity and redshift range, to determine the evolving morphologies and effects of obscuration in the galaxies which dominate the cosmic SFR at 0
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