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arXiv · 0907.0034

Comparisons of the radial distributions of core-collapse supernovae with those of young and old stellar populations

J. P. Anderson·P. A. James
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Abstract

We present observational constraints on the nature of core-collapse supernovae through an investigation into their radial distributions with respect to those of young and old stellar populations within their host galaxies, as traced by H-alpha emission and R-band light respectively. We discuss results and the implications they have on the nature of supernova progenitors, for a sample of 177 core-collapse supernovae. We find that the radial positions of the overall core-collapse population closely follow the radial distribution of H-alpha emission, implying that both are excellent tracers of star formation within galaxies. Within this overall distribution we find that there is a central deficit of SNII which is offset by a central excess of SNIb/c. This implies a strong metallicity dependence on the relative production of the two types, with SNIb/c arising from higher metallicity progenitors than SNII. Separating the SNIb/c into individual classes we find that a trend emerges in terms of progenitor metallicity going from SNII through SNIb to SNIc, with the latter arising from the highest metallicity progenitors.

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J. P. Anderson, P. A. James. 2009-07-07. Comparisons of the radial distributions of core-collapse supernovae with those of young and old stellar populations. https://doi.org/10.1111/j.1365-2966.2009.15324.x

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