The MUSE view of the host galaxy of GRB 100316D

DOI: 
10.1093/mnras/stx2244
Publication date: 
01/12/2017
Main author: 
Izzo, L.
IAA authors: 
Izzo, L.;Thöne, C. C.;Cano, Z.;de Ugarte Postigo, A.;Kann, D. A.;Bensch, K.;Sánchez-Ramírez, R.
Authors: 
Izzo, L.;Thöne, C. C.;Schulze, S.;Mehner, A.;Flores, H.;Cano, Z.;de Ugarte Postigo, A.;Kann, D. A.;Amorín, R.;Anderson, J. P.;Bauer, F. E.;Bensch, K.;Christensen, L.;Covino, S.;Della Valle, M.;Fynbo, J. P. U.;Jakobsson, P.;Klose, S.;Kuncarayakti, H.;Leloudas, G.;Milvang-Jensen, B.;Møller, P.;Puech, M.;Rossi, A.;Sánchez-Ramírez, R.;Vergani, S. D.
Journal: 
Monthly Notices of the Royal Astronomical Society
Refereed: 
Yes
Publication type: 
Article
Volume: 
472
Pages: 
4480
Abstract: 

The low distance, z = 0.0591, of GRB 100316D and its association with SN 2010bh represent two important motivations for studying this host galaxy and the GRB's immediate environment with the integral field spectrographs like Very Large Telescope/Multi-Unit Spectroscopic Explorer. Its large field of view allows us to create 2D maps of gas metallicity, ionization level and the star formation rate (SFR) distribution maps, as well as to investigate the presence of possible host companions. The host is a late-type dwarf irregular galaxy with multiple star-forming regions and an extended central region with signatures of on-going shock interactions. The gamma-ray burst (GRB) site is characterized by the lowest metallicity, the highest SFR and the youngest (̃20-30 Myr) stellar population in the galaxy, which suggest a GRB progenitor stellar population with masses up to 20-40 M<SUB>☉</SUB>. We note that the GRB site has an offset of ̃660 pc from the most luminous SF region in the host. The observed SF activity in this galaxy may have been triggered by a relatively recent gravitational encounter between the host and a small undetected (L<SUB>H α</SUB> ≤ 10<SUP>36</SUP> erg s<SUP>-1</SUP>) companion.

Database: 
ADS
URL: 
https://ui.adsabs.harvard.edu/#abs/2017MNRAS.472.4480I/abstract
ADS Bibcode: 
2017MNRAS.472.4480I
Keywords: 
gamma-ray burst: general;gamma-ray burst: individual: GRB 100316D;galaxies: abundances;galaxies: general;galaxies: star formation;Astrophysics - Astrophysics of Galaxies