We report on radio continuum observations of the host galaxy of the short gamma-ray burst 071227 (z = 0.381) with the Australia Telescope Compact Array. We detect the galaxy in the 5.5 GHz band with an integrated flux density of F ν = 43 ± 11 μJy, corresponding to an unobscured star-formation rate of about 24 M ⊙ yr-1, 40 times higher than what was found from optical emission lines. Among the ~30 well-identified and studied host galaxies of short bursts this is the third case where the host is found to undergo an episode of intense star formation. This suggests that a fraction of all short-burst progenitors hosted in star-forming galaxies could be physically related to recent star formation activity, implying a relatively short merger timescale.
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Titolo: | Another Short-burst Host Galaxy with an Optically Obscured High Star Formation Rate: The Case of GRB 071227 |
Autori: | |
Data di pubblicazione: | 2014 |
Rivista: | |
Handle: | http://hdl.handle.net/20.500.11770/143563 |
Appare nelle tipologie: | 1.1 Articolo in rivista |