Galactic Twins of the Ring Nebula Around SN1987A and a Possible LBV-like Phase for Sk-69 202

Details Galactic Twins of the Ring Nebula Around SN1987A and a Possible LBV-like Phase for Sk-69 202 Galactic Twins of the Ring Nebula Around SN1987A and a Possible LBV-like Phase for Sk-69 202

2007-05-21

arxiv.org/abs/0705.3069v1

Astron.J.133:1034-1040,2007

Astronomy and Astrophysics

Astrophysics

2 pages, to appear in procedings of "Massive stars: fundamental parameters and circumstellar interactions", conference in hono

Scientific paper

10.1086/510838

Some core-collapse supernovae show clear signs of interaction with dense circumstellar material that often appears to be non-spherical. Circumstellar nebulae around supernova progenitors provide clues to the origin of that asymmetry in immediate pre-supernova evolution. Here I discuss outstanding questions about the formation of the ring nebula around SN1987A and some implications of similar ring nebulae around Galactic B supergiants. Several clues hint that SN1987A's nebula may have been ejected in an LBV-like event, rather than through interacting winds in a transition from a red supergiant to a blue supergiant.

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