The host galaxies of core-collapse supernovae and gamma-ray bursts
Svensson, K. M. (Karl Mikael), Levan, A. J., Tanvir, N. R., Fruchter, A. S. and Strolger, L. -G.. (2010) The host galaxies of core-collapse supernovae and gamma-ray bursts. Monthly Notices of the Royal Astronomical Society, Vol.405 (No.1). pp. 57-76. ISSN 0035-8711Full text not available from this repository.
Official URL: http://dx.doi.org/10.1111/j.1365-2966.2010.16442.x
We present a comparative study of the galactic and small-scale environments of gamma-ray bursts (GRBs) and core-collapse supernovae (CCSNe). We use a sample of 34 GRB hosts at z < 1.2, and a comparison sample of 58 supernova hosts located within the Great Observatories Origins Deep Survey footprint. We fit template spectra to the available photometric data, which span the range 0.45-24 mu m, and extract absolute magnitudes, stellar masses and star formation rates from the resulting fits. Our results broadly corroborate previous findings, but offer significant enhancements in spectral coverage and a factor 2-3 increase in sample size. Specifically, we find that CCSNe occur frequently in massive spirals (spiral fraction similar to 50 per cent). In contrast GRBs occur in small, relatively low mass galaxies with high specific and surface star formation rates, and have a spiral fraction of only similar to 10 per cent. A comparison of the rest-frame absolute magnitudes of the GRB and CCSN sample is less conclusive than found in previous work, suggesting that while GRB hosts are typically both smaller and bluer than those of CCSN their total blue light luminosities are only slightly lower. We suggest this is likely due to rapid periods of intensified star formation activity, as indicated by the high specific SFRs, which both create the GRB progenitors and briefly significantly enhance the host galaxy blue luminosity. Finally, our analysis of local environments of GRBs and CCSNe shows that GRBs are highly concentrated on their host light, and further occur in regions of higher absolute surface luminosity than CCSNe.
|Item Type:||Journal Article|
|Subjects:||Q Science > QB Astronomy|
|Divisions:||Faculty of Science > Physics|
|Journal or Publication Title:||Monthly Notices of the Royal Astronomical Society|
|Official Date:||11 June 2010|
|Number of Pages:||20|
|Page Range:||pp. 57-76|
|Access rights to Published version:||Restricted or Subscription Access|
|Funder:||University of Warwick, STFC, Spitzer/NASA, NASA|
|Grant number:||1287913, NAS 5-26555|
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