Back to Search
Start Over
A quiescent galaxy at the position of the long GRB 050219A
- Source :
- A&A 572, A47 (2014)
- Publication Year :
- 2014
-
Abstract
- Long-duration gamma-ray bursts (LGRBs) are produced by the collapse of very massive stars. Due to the short lifetime of their progenitors, LGRBs pinpoint star-forming galaxies. We present here a multi-band search for the host galaxy of the long dark GRB 050219A within the enhanced Swift/XRT error circle. We used spectroscopic observations acquired with VLT/X-shooter to determine the redshift and star-formation rate of the putative host galaxy. We compared the results with the optical/IR spectral energy distribution obtained with different facilities. Surprisingly, the host galaxy is a old and quiescent early-type galaxy at z = 0.211 characterised by an unprecedentedly low specific star-formation rate. It is the first LGRB host to be also an early-type post-starburst galaxy. This is further evidence that GRBs can explode in all kind of galaxies, with the only requirement being an episode of star-formation.<br />Comment: 11 pages, 10 figures, 3 tables; accepted for publication in Astronomy & Astrophysics
- Subjects :
- Astrophysics - High Energy Astrophysical Phenomena
Subjects
Details
- Database :
- arXiv
- Journal :
- A&A 572, A47 (2014)
- Publication Type :
- Report
- Accession number :
- edsarx.1409.0017
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1051/0004-6361/201423865