Moderate Asphericity of the SN 2002ic Circumstellar Envelope

Details Moderate Asphericity of the SN 2002ic Circumstellar Envelope Moderate Asphericity of the SN 2002ic Circumstellar Envelope

2006-11-09

arxiv.org/abs/astro-ph/0611302v1

Astrophys.J.657:378-382,2007

Astronomy and Astrophysics

Astrophysics

13 pages, 4 figs., ApJ, accepted

Scientific paper

10.1086/510767

The polarization of SN 2002ic interacting with a dense circumstellar envelope is calculated in the context of the asymmetric version of a previously proposed spherical interaction model. The circumstellar envelope is taken to be oblate. The observed polarization (Wang et al. 2004) can be reproduced for an aspect ratio of 0.65-0.7 assuming inclination angles >60 degrees. This model predicts a weak sensitivity of the line profiles to the orientation, in agreement with the absence of significant variations of the line profiles among SN 2002ic-like supernovae. We propose a test for distinguishing between the binary and single star progenitor scenarios based upon the polarization distribution function for the growing sample of these events.

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