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arXiv · 1309.0368

The explosion of supernova 2011fe in the frame of the core-degenerate scenario

Noam Soker·Enrique Garcia-Berro·Leandro G. Althaus
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Abstract

We argue that the properties of the Type Ia supernova (SN Ia) SN 2011fe can be best explained within the frame of the core-degenerate (CD) scenario. In the CD scenario a white dwarf (WD) merges with the core of an asymptotic giant branch (AGB) star and forms a rapidly rotating WD, with a mass close to and above the critical mass for explosion. Rapid rotation prevents immediate collapse and/or explosion. Spinning down over a time of 0-10 Gyr brings the WD to explosion. A very long delayed explosion to post-crystallization phase, which lasts for about 2 Gyr leads to the formation of a highly carbon-enriched outer layer. This can account for the carbon-rich composition of the fastest-moving ejecta of SN 2011fe. In reaching the conclusion that the CD scenario best explains the observed properties of SN 2011fe we consider both its specific properties, like a very compact exploding object and carbon rich composition of the fastest-moving ejecta, and the general properties of SNe Ia.

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Noam Soker, Enrique Garcia-Berro, Leandro G. Althaus. 2013-10-10. The explosion of supernova 2011fe in the frame of the core-degenerate scenario. https://doi.org/10.1093/mnrasl%2Fslt142

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