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arXiv 0801.1100astro-ph
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超新星爆炸的非球面性

Asphericity in Supernova Explosions from Late-Time Spectroscopy

Keiichi Maeda, Koji Kawabata, Paolo A. Mazzali, Masaomi Tanaka, Stefano Valenti, Ken'ichi Nomoto, Takashi Hattori, Jinsong Deng, Elena Pian, Stefan Taubenberger… 展开作者

Keiichi Maeda, Koji Kawabata, Paolo A. Mazzali, Masaomi Tanaka, Stefano Valenti, Ken'ichi Nomoto, Takashi Hattori, Jinsong Deng, Elena Pian, Stefan Taubenberger, Masanori Iye, Thomas Matheson, Alexei V. Filippenko, Kentaro Aoki, George Kosugi, Youichi Ohyama, Toshiyuki Sasaki, Tadafumi Takata

摘要:

核心坍缩超新星(CC-SNe)是宣布大质量恒星死亡的爆炸。一些CC-SNe与长持续时间的伽马射线暴(GRB)有关,并且是高度非球面的。一个重要的问题是非球面性在多大程度上是所有CC-SNe所共有的。在这里,我们提出了一些CC-SNe从剥离信封星的后期光谱,并使用它们来探索任何非球面产生的内部爆炸的恒星,附近的网站崩溃。一系列的氧发射线的档案进行了观察,包括高发病率的双峰档案,一个独特的签名的非球面爆炸。我们的研究结果表明,所有的CC-SNe从剥离信封星是非球面爆炸和SNe伴随着伽玛暴表现出最高程度的非球面性。

英文摘要:

Core-collapse supernovae (CC-SNe) are the explosions that announce the death of massive stars. Some CC-SNe are linked to long-duration gamma-ray bursts (GRBs) and are highly aspherical. One important question is to what extent asphericity is common to all CC-SNe. Here we present late-time spectra for a number of CC-SNe from stripped-envelope stars, and use them to explore any asphericity generated in the inner part of the exploding star, near the site of collapse. A range of oxygen emission-line profiles is observed, including a high incidence of double-peaked profiles, a distinct signature of an aspherical explosion. Our results suggest that all CC-SNe from stripped-envelope stars are aspherical explosions and that SNe accompanied by GRBs exhibit the highest degree of asphericity.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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