The explosion of supernova 2011fe in the frame of the core-degenerate scenario
The explosion of supernova 2011fe in the frame of the core-degenerate scenario
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DOI：
10.1093/mnrasl/slt142
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发表时间：
2013-09
影响因子：
4.8
通讯作者：
N. Soker;E. García–Berro;L. Althaus
中科院分区：
文献类型：
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作者：
N. Soker;E. García–Berro;L. Althaus
我们认为，Ia型超新星(SNIa)SN2011Fe的性质可以在核简并(CD)的框架内得到最好的解释。在CD场景中，一颗白矮星(WD)与一颗渐近巨星分支(AGB)的核心合并，形成一个快速旋转的WD，其质量接近并高于爆炸的临界质量。快速旋转可防止立即坍塌和/或爆炸。在0-10 Gyr的时间内减速会使WD发生爆炸。一个非常长的延迟爆炸到后结晶阶段，持续约2 Gyr，导致形成高度富碳的外层。这可以解释移动速度最快的SN 2011Fe喷射物的富碳成分。在得出CD情景最好地解释了SN2011Fe的观测性质的结论时，我们既考虑了它的特殊性质，如一个非常致密的爆炸物体和运动最快的富碳成分，也考虑了SNE Ia的一般性质。
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.