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The star-formation rate in the host of GRB 990712

Astronomy and AstrophysicsPublished 1 December 2001Open access
P. M. Vreeswijk, R. P. Fender, M. A. Garrett, S. J. Tingay, A. S. Fruchter, L. Kaper
Citations19
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Abstract

\n We have observed the host galaxy of GRB 990712 at 1.4 GHz with the Australia Telescope\nCompact Array, to obtain an estimate of its total star-formation rate. We do not detect a source\nat the position of the host. The 2σ upper limit of 70 μJy implies that the total\nstar-formation rate is lower than 100 $M_{\\odot}$ yr-1, using conservative values for the\nspectral index and cosmological parameters. This upper limit is in stark contrast with recent\nreports of radio/submillimeter-determined star-formation rates of ~500 $M_{\\odot}$ yr-1\nfor two other GRB host galaxies. Our observations present the deepest radio-determined\nstar-formation rate limit on a GRB host galaxy yet, and show that also from the\nunobscured radio point-of-view, not every GRB host galaxy is a vigorous starburst. \n\n

Keywords

Physics and Astronomy