A postmortem investigation of the Type IIb supernova 2001ig

Details A postmortem investigation of the Type IIb supernova 2001ig A postmortem investigation of the Type IIb supernova 2001ig

2006-03-14

arxiv.org/abs/astro-ph/0603336v1

Mon.Not.Roy.Astron.Soc.Lett.369:L32-L36,2006

Astronomy and Astrophysics

Astrophysics

5 pages, 3 figures. Accepted for publication in MNRAS Letters. Fig. 1 resolution degraded to meet size limitations; full resol

Scientific paper

10.1111/j.1745-3933.2006.00168.x

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.

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