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On the nature of the circumstellar medium of the remarkable type Ia/IIn supernova, SN 2002ic

Rubina Kotak·Peter Meikle·Andy Adamson·Sandy Leggett
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Abstract

We present results from the first high resolution, high S/N, spectrum of SN 2002ic. The resolved Halpha line has a P Cygni-type profile, clearly demonstrating the presence of a dense, slow-moving (100 km/s) outflow. We have additionally found a huge near-IR excess, hitherto unseen in type Ia SNe. We argue that this is due to an IR light-echo arising from the pre-existing dusty circumstellar medium. We deduce a CSM mass probably exceeding 0.3Msun produced by a mass loss rate greater than several times 10^-4 Msun/yr. For the progenitor, we favour a single degenerate system where the companion is a post-AGB star. As a by-product of our optical data, we are able to provide a firm identification of the host galaxy of SN 2002ic.

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Rubina Kotak, Peter Meikle, Andy Adamson, Sandy Leggett. 2004-08-17. On the nature of the circumstellar medium of the remarkable type Ia/IIn supernova, SN 2002ic. https://doi.org/10.1111/j.1365-2966.2004.08306.x

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