Astronomy and Astrophysics – Astrophysics
Scientific paper
2006-05-24
Astrophys.J. 645 (2006) L53-L56
Astronomy and Astrophysics
Astrophysics
Accepted to ApJL. 11 pages, 1 table
Scientific paper
10.1086/506179
We propose that a nova shell ejected from a recurrent nova progenitor system created the evacuated region around the explosion center of SN 2002ic. In this picture, periodic shell ejections due to nova explosions on a white dwarf sweep up the slow wind from the binary companion, creating density variations and instabilities that lead to structure in the circumstellar medium (CSM). Our model naturally explains the observed gap between the supernova explosion center and the CSM in SN 2002ic, accounts for the density variations observed in the CSM, and resolves the coincidence problem of the timing of the explosion of SN 2002ic with respect to the apparent cessation of mass-loss in the progenitor system. We also consider such nova outburst sweeping as a generic feature of Type Ia supernovae with recurrent nova progenitors.
Sokoloski Jennifer L.
Wood-Vasey William Michael
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