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Supernova interaction with dense mass loss

Published online by Cambridge University Press:  29 January 2014

Roger A. Chevalier
Roger A. Chevalier*
Affiliation:
Dept. of Astronomy, University of Virginia, P.O. Box 400325, Charlottesville, VA 22903, USA email: [email protected]
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Abstract

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Supernovae of Type IIn (narrow line) appear to be explosions that had strong mass loss before the event, so that the optical luminosity is powered by the circumstellar interaction. If the mass loss region has an optical depth >c/vs, where vs is the shock velocity, the shock breakout occurs in the mass loss region and a significant fraction of the explosion energy can be radiated. The emission from the superluminous SN 2006gy and the normal luminosity SN 2011ht can plausibly be attributed to shock breakout in a wind, with SN 2011ht being a low energy event. Superluminous supernovae of Type I may derive their luminosity from interaction with a mass loss region of limited extent. However, the distinctive temperature increase to maximum luminosity has not been clearly observed in Type I events. Suggested mechanisms for the strong mass loss include pulsational pair instability, gravity-waves generated by instabilities in late burning phases, and binary effects.

Keywords

(stars:) supernovae: general
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 9 , Symposium S296: Supernova Environmental Impacts , January 2013 , pp. 95 - 102
Copyright
Copyright © International Astronomical Union 2014 

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