ANOTHER SHORT-BURST HOST GALAXY WITH AN OPTICALLY OBSCURED HIGH STAR FORMATION RATE: THE CASE OF GRB 071227

A. Nicuesa Guelbenzu*, S. Klose, M. J. Michalowski, S. Savaglio, D. A. Kann, A. Rossi, L. K. Hunt, J. Gorosabel, J. Greiner, M. R. G. McKenzie, E. Palazzi, S. Schmidl

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

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-nu = 43 +/- 11 mu Jy, corresponding to an unobscured star-formation rate of about 24 M-circle dot yr(-1), 40 times higher than what was found from optical emission lines. Among the similar to 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.

Original languageEnglish
Article number45
Number of pages6
JournalAstrophysical Journal
Volume789
Issue number1
DOIs
Publication statusPublished - 1 Jul 2014

Keywords

  • gamma-ray burst: individual (GRB 071227)
  • GAMMA-RAY BURSTS
  • SUBMILLIMETER GALAXIES
  • COSMOLOGICAL PARAMETERS
  • RADIO OBSERVATIONS
  • EXTENDED EMISSION
  • LIGHT CURVES
  • PROGENITORS
  • AFTERGLOWS
  • DUST
  • SUPERNOVAE

Cite this