A postmortem investigation of the type iib supernova 2001ig - INSPIRE

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A postmortem investigation of the type iib supernova 2001ig

Mar, 2006

5 pages

Published in:

Mon.Not.Roy.Astron.Soc. 369 (2006) L32-L36

e-Print:

astro-ph/0603336 [astro-ph]

DOI:

10.1111/j.1745-3933.2006.00168.x

View in:

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Abstract: (arXiv)

We present images taken with the GMOS instrument on Gemini-South, in excellent (<0.5 arcsec) seeing, of SN 2001ig in NGC 7424, ~1000 days after explosion. A point source seen at the site of the SN is shown to have colours inconsistent with being an H II region or a SN 1993J-like remnant, but can be matched to a late-B through late-F supergiant with A_V<1. We believe this object is the massive binary companion responsible for periodic modulation in mass loss material around the Wolf-Rayet progenitor which gave rise to significant structure in the SN radio light curve.

Note:

5 pages, 3 figures. Accepted for publication in MNRAS Letters. Fig. 1 resolution degraded to meet size limitations: full resolution version available from http://www.aao.gov.au/local/www/sdr/pubs/sn2001ig_gmos.ps.gz

binaries: general
stars: evolution
supernovae: general
supernovae: individual: SN 2001ig
galaxies: individual: NGC 7424

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