A Spallation Model for the Titanium-rich Supernova Remnant Cassiopeia A
Abstract
Titanium-rich subluminous supernovae are rare and challenge current SN nucleosynthesis models. We present a model in which ejecta from a standard Supernova is impacted by a second explosion of the neutron star (a Quark-nova), resulting in spallation reactions that lead to 56Ni destruction and 44Ti creation under the right conditions. Basic calculations of the spallation products shows that a delay between the two explosions of ~ 5 days reproduces the observed abundance of 44Ti in Cas A and explains its low luminosity as a result of the destruction of 56Ni. Our results could have important implications for lightcurves of subluminous as well as superluminous supernovae.
Keywords
Cite
@article{arxiv.1109.2124,
title = {A Spallation Model for the Titanium-rich Supernova Remnant Cassiopeia A},
author = {Rachid Ouyed and Denis Leahy and Amir Ouyed and Prashanth Jaikumar},
journal= {arXiv preprint arXiv:1109.2124},
year = {2015}
}
Comments
Accepted/to be published in Physical Review Letters. [ for more info on the Quark Nova, see: http://quarknova.ucalgary.ca/ ]