2007A&A...474..815M


C.D.S. - SIMBAD4 rel 1.7 - 2020.04.07CEST12:55:39

2007A&A...474..815M - Astronomy and Astrophysics, volume 474, 815-826 (2007/11-2)

The host galaxy of GRB031203: a new spectroscopic study.

MARGUTTI R., CHINCARINI G., COVINO S., TAGLIAFERRI G., CAMPANA S., DELLA VALLE M., FILIPPENKO A.V., FIORE F., FOLEY R., FUGAZZA D., GIOMMI P., MALESANI D., MORETTI A. and STELLA L.

Abstract (from CDS):

The host galaxy of the long-duration gamma-ray burst (GRB) 031203 (HG031203) offers a precious opportunity to study in detail the environment of a nearby GRB. The aim is to better characterize this galaxy and analyse the possible evolution with time of the spectroscopic quantities we derive. We analyse HG031203 using a set of optical spectra acquired with the ESO-VLT and Keck telescope. We compare the metallicity, luminosity and star formation properties of this galaxy and of the other supernova-long gamma-ray burst hosts in the local universe (z<0.2) against the KPNO International Spectroscopic Survey. HG031203 is a metal poor, actively star forming galaxy (star formation rate of 12.9±2.2M/yr) at z=0.1054. From the emission-line analysis we derive an intrinsic reddening EHG(B-V)≃0.4. This parameter doesn't show a compelling evidence of evolution at a month time-scale. We find an interstellar medium temperature of ≃12500K and an electronic density of Ne=160cm–3. After investigating for possible Wolf-Rayet emission features in our spectra, we consider dubious the classification of HG031203 as a Wolf-Rayet galaxy. Long gamma-ray burst (LGRB) and supernova hosts in the local universe (z<0.2) show, on average, specific star formation rates higher than ordinary star forming galaxy at the same redshift. On the other hand, we find that half of the hosts follows the metallicity-luminosity relation found for star-burst galaxies; HG031203 is a clear outlier, with its really low metallicity (12+log(O/H)=8.12±0.04).

Abstract Copyright:

Journal keyword(s): gamma rays: bursts - galaxies: individual: GRB031203 - ISM: abundances - stars: Wolf-Rayet

Status at CDS:  

Simbad objects: 7

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Number of rows : 7

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 9298 1
2 SN 2006aj SN* 03 21 39.670 +16 52 02.27 17.96 19.11 17.40     SNIc-BL 817 1
3 SN 2003lw SN* 08 02 30.1 -39 51 03       20.23   SNIc: 501 0
4 Anon J080230-3951 G 08 02 30.20 -39 51 03.0 22.31 22.32 20.53 20.44 19.40 ~ 20 0
5 ESO 314-2 GiG 08 57 28.616 -39 16 06.43   14.32   11.55 12.4 ~ 15 0
6 SN 2003dh SN* 10 44 50.030 +21 31 18.15     16.2     SNIcpec 1104 2
7 SN 1998bw SN* 19 35 03.17 -52 50 46.1   14.09       SNIc 1632 2

    Equat.    Gal    SGal    Ecl

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2020.04.07-12:55:39

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