Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2012
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21914205p&link_type=abstract
American Astronomical Society, AAS Meeting #219, #142.05
Astronomy and Astrophysics
Astronomy
Scientific paper
If a significant fraction of cosmic star formation occurs in submillimeter- and radio-luminous galaxies, and if gamma-ray bursts serve as an unbiased tracer of star formation, many GRBs should be hosted within these systems - but few radio host detections have been reported to date. We present host observations with the full-bandwidth EVLA of a sample of highly dust-obscured ("dark") GRBs previously found to have occurred within significantly dust-obscured galaxies. All systems are quite faint at radio wavelengths, and most are undetected even at the level of the EVLA's sensitivity (RMS 5 microJy). The implied radio-derived star-formation rates are modest, usually comparable to what is inferred from the dust-corrected optical observations. These results suggest that most dark GRBs occur within dusty regions of relatively ordinary galaxies, and indicate that the most extreme systems rarely produce GRBs.
Perley Daniel A.
Perley Richard A.
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