A Central Excess of Stripped-Envelope Supernovae within Disturbed Galaxies

摘要: This paper presents an analysis of core-collapse supernova distributions in isolated and interacting host galaxies, paying close attention to the selection effects involved conducting galaxy studies. When taking into account all within our sample, we draw following conclusions. Within interacting, or ‘disturbed', systems there is a real, statistically significant, increase fraction stripped-envelope supernovae central regions. A discussion what may cause this increased fraction, compared more common Type IIP II without subclassifications, presented. Selection are shown not drive result, so propose that study provides direct evidence for high-mass weighted initial mass function regions disturbed galaxies. Within ‘undisturbed' spiral galaxies radial distribution Ib Ic very different, with latter showing centrally concentrated distribution. could be driven by metallicity gradients these undisturbed variations other properties (binarity stellar rotation) driving envelope loss progenitor stars. result found ‘disturbed' systems, where consistent.