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

Rubina Kotak, W.P.S. Meikle, A. Adamson, S.K. Leggett

Research output: Contribution to journalArticle

52 Citations (Scopus)

Abstract

We present results from the first high-resolution, high signal-to-noise ratio spectrum of SN 2002ic. The resolved Ha line has a P Cygni-type profile, clearly demonstrating the presence of a dense, slow-moving (~100 km s-1) outflow. We have additionally found a huge near-infrared excess, hitherto unseen in Type Ia supernovae. We argue that this is due to an infrared light-echo arising from the pre-existing dusty circumstellar medium. We deduce a circumstellar medium mass probably exceeding 0.3 Msolar produced by a mass-loss rate greater than several times 10-4 Msolar yr-1. For the progenitor, we favour a single-degenerate system where the companion is a post-asymptotic giant branch star. As a by-product of our optical data, we are able to provide a firm identification of the host galaxy of SN 2002ic.
Original languageEnglish
Pages (from-to)L13-L17
Number of pages5
JournalMonthly Notices of the Royal Astronomical Society
Volume354(2)
Issue number2
DOIs
Publication statusPublished - 21 Oct 2004

ASJC Scopus subject areas

  • Space and Planetary Science

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