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Investigation of Early Plasma Evolution Induced by Ultrashort Laser Pulses
Published on: July 2, 2012
一个巨大的爆发发生在一个巨大的恒星的核心崩前两年
A Pastorello1, S J Smartt, S Mattila
1Astrophysics Research Centre, School of Mathematics and Physics, Queen's University Belfast, Belfast BT7 1NN, UK. a.pastorello@qub.ac.uk
Nature
|June 15, 2007
概括
我们确定了一个特殊的Ib型超新星 (SN 2006jc) 的祖先是狼-雷耶星. 这颗恒星很可能被丰富的介质所包围,这解释了先前的光学短暂.
科学领域:
- 天文学和天体物理学
- 恒星进化 恒星进化
- 超新星是指一个超新星.
背景情况:
- 巨大的恒星死亡导致超新星,II,Ib和Ic类型与祖先恒星结构相关.
- 虽然II型超新星的前体已知,但缺乏气的Ib/Ic型超新星的前体仍然不明.
- 关于Ib型和Ic型超新星的祖先的直接观测数据很少.
研究的目的:
- 为了研究特殊的Ib型超新星SN 2006jc.的祖先.
- 了解在2004年之前的SN 2006jc.观察到的明亮光学瞬态的性质.
- 探索观察到的爆炸前瞬态及其与超新星的关系的潜在解释.
主要方法:
- 在空间上将SN 2006jc与先前观察到的光学瞬态相对应.
- 对超新星SN 2006jc.进行光谱和光度监测.
- 分析祖先的特征,包括它的恒星类型和环恒星环境.
主要成果:
- 在空间上,SN 2006jc与2004年的一次明亮的光学瞬态相吻合.
- 据推测,它的祖先是一个碳氧狼雷耶恒星,位于丰富的环恒星环境中.
- 爆炸前的过渡期与发光的蓝色变星 (LBV) 爆发有相似之处,但在祖先的组成上有所不同.
结论:
- SN 2006jc的祖先很可能是一个狼雷耶星,可能经历了类似LBV的爆发或是二进制星系的一部分.
- 这一发现提供了潜在的观测证据,证明狼雷特恒星的LBV类爆发.
- 涉及LBV和狼雷耶恒星的大型二进制星系是观察到的现象的一个合理的解释.
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