Other
Scientific paper
Jan 2012
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21931004l&link_type=abstract
American Astronomical Society, AAS Meeting #219, #310.04
Other
Scientific paper
The recent long-duration GRB 100316D, associated with supernova SN 2010bh and detected by Swift, is one of the nearest GRB-SNe ever observed (z = 0.059). This provides us with a unique opportunity to study the explosion environment on kpc scale in relation to the host galaxy complex. Here we present spatially-resolved spectrophotometry of the host galaxy, focusing on both the explosion site and the brightest star-forming regions. Using these data, we extract the spatial profiles of the relevant emission features (H-alpha, H-beta, [OIII] 5007A, and [NII] 6584A), and use these profiles to examine variations in metallicity and star formation rate as a function of position in the host galaxy. We conclude that GRB 100316D/SN2010bh occurred in a low-metallicity host galaxy, and that the GRB-SN explosion site corresponds to the region with the lowest metallicity and highest star formation rate sampled by our observations. Combining our work with other recent spatially-resolved studies of nearby GRB host galaxies, these results have compelling implications for larger-scale studies of LGRB host environments at higher redshifts. This research was supported in part by NASA through an Einstein Postdoctoral Fellowship.
Berger Edmond
Chornock Ryan
Levesque Emily M.
Soderberg Alicia Margarita
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