%0 Journal Article
%T X-ray Emission from Strongly Asymmetric Circumstellar Material in the Remnant of Kepler's Supernova
%A Mary T. Burkey
%A Stephen P. Reynolds
%A Kazimierz J. Borkowski
%A John M. Blondin
%J Physics
%D 2012
%I arXiv
%R 10.1088/0004-637X/764/1/63
%X Kepler's supernova remnant resulted from a thermonuclear explosion, but is interacting with circumstellar material (CSM) lost from the progenitor system. We describe a statistical technique for isolating X-ray emission due to CSM from that due to shocked ejecta. Shocked CSM coincides well in position with 24 $\mu$m emission seen by {\sl Spitzer}. We find most CSM to be distributed along the bright north rim, but substantial concentrations are also found projected against the center of the remnant, roughly along a diameter with position angle $\sim 100^\circ$. We interpret this as evidence for a disk distribution of CSM before the SN, with the line of sight to the observer roughly in the disk plane. We present 2-D hydrodynamic simulations of this scenario, in qualitative agreement with the observed CSM morphology. Our observations require Kepler to have originated in a close binary system with an AGB star companion.
%U http://arxiv.org/abs/1212.4534v1