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2012MNRAS.424.2841H - Mon. Not. R. Astron. Soc., 424, 2841-2853 (2012/August-3)
A central excess of stripped-envelope supernovae within disturbed galaxies.
HABERGHAM S.M., JAMES P.A. and ANDERSON J.P.
Abstract (from CDS):
systems there is a real, and statistically significant, increase in the fraction of stripped-envelope supernovae in the central regions. A discussion into what may cause this increased fraction, compared to the more common Type IIP supernovae and Type II supernovae without subclassifications, is presented. Selection effects are shown not to drive this result, and so we propose that this study provides direct evidence for a high-mass weighted initial mass function within the central regions of disturbed galaxies.} {\listitem Within `undisturbed' spiral galaxies the radial distribution of Type Ib and Type Ic supernovae is statistically very different, with the latter showing a more centrally concentrated distribution. This could be driven by metallicity gradients in these undisturbed galaxies, or radial variations in other properties (binarity or stellar rotation) driving envelope loss in progenitor stars. This result is not found in `disturbed' systems, where the distributions of Type Ib and Ic supernovae are consistent.}
Abstract Copyright: 2012 The Authors Monthly Notices of the Royal Astronomical Society 2012 RAS
Journal keyword(s): supernovae: general - galaxies: fundamental parameters - galaxies: interactions - galaxies: starburst
VizieR on-line data: <Available at CDS (J/MNRAS/424/2841): table1.dat>
Simbad objects: 245
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