LGRB/SN host galaxies and the KISS survey: HG031203 case study

R. Margutti*, G. Chincarini

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We present optical diagnostics of the sample of local (z ≤ 0.1) Host Galaxies (HG) of long duration Gamma-Ray Burst (LGRB) with associated supernova available to date. In particular we revisit the HG031203 using a set of spectra acquired with VLT. Taking into account the Galactic colour excess E MW(B - V) = 0.72 mag in the direction of the burst, we derive for this galaxy an intrinsic reddening E(B - V) HG ≈ 0.4 mag. With EW rest(Hα) = 757Å and SFR(Hα) = 12.3 ± 2.1 M yr -1, this system is likely to be undergoing a very intense burst of star formation. Furthermore, after investigating for traces of Wolf-Rayet (WR) stars emission in HG031203 spectra, we conclude that this galaxy does not host a clearly detectable WR population. Finally, we compare the properties of local LGRB hosts, with those of a complete sample of 1029 Emission Line Galaxies (ELGs) with z ≤ 0.1 from the KPNO International Spectroscopic Survey (KISS). We find that HGs are characterized by a specific star formation rate (SSFR) higher than normal.

Original languageEnglish (US)
Title of host publicationTHE MULTICOLORED LANDSCAPE OF COMPACT OBJECTS AND THEIR EXPLOSIVE ORIGINS
Pages135-142
Number of pages8
DOIs
StatePublished - Oct 24 2007
EventTHE MULTICOLORED LANDSCAPE OF COMPACT OBJECTS AND THEIR EXPLOSIVE ORIGINS - Cefalu, Sicily, Italy
Duration: Jun 11 2006Jun 24 2006

Publication series

NameAIP Conference Proceedings
Volume924
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

OtherTHE MULTICOLORED LANDSCAPE OF COMPACT OBJECTS AND THEIR EXPLOSIVE ORIGINS
CountryItaly
CityCefalu, Sicily
Period6/11/066/24/06

Keywords

  • Galaxies:HGO3 1203
  • Gamma rays: burst

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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