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这颗巨大的二进制伴星是1993J超新星的祖先
Justyn R Maund1, Stephen J Smartt, Rolf P Kudritzki
1Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA, UK. jrm@ast.cam.ac.uk
Nature
|January 9, 2004
概括
在超新星SN1993J发生10年后,天文学家发现了它的巨大的双星伴星. 这一发现证实了原始恒星失去了其气外的伴侣,解释了超新星的出现.
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:
- 超新星 (SN) 1993J,最初被归类为富含的II型,转变为缺乏的Ib型.
- 爆炸前的观测表明SN 1993J的祖先是一个红色超巨星,有一个巨大的伴侣或在一个年轻的恒星中.
- 模型提出SN 1993J是一颗IIb型超新星,由质量转移到二进制伴侣的结果,但这个伴侣仍然未被发现.
研究的目的:
- 为了识别超新星 (SN) 1993J祖先的难以捉摸的大质量伴星.
- 确认二进制伴侣在导致SN 1993J独特光谱演变的质量损失过程中的作用.
- 为IIb型超新星中的二元伴侣假设提供观测证据.
主要方法:
- 进行了SN 1993J爆炸后十年的光度和光谱观测.
- 分析数据以检测和描述超新星位置上的恒星特征.
- 利用先进的成像技术来解决超新星残骸附近的微弱物体.
主要成果:
- 在色的超新星SN 1993J现场检测到一颗大质量恒星的明确特征.
- 证实了超新星祖先的双星伴星的存在.
- 检测到的伴星为二进制相互作用模型提供了直接的证据.
结论:
- 检测到的大质量恒星是负责剥离原始恒星的包裹的双星伴侣.
- 这一发现为IIb型超新星祖先中巨型伴星的存在提供了第一个直接证据.
- 这些发现解决了长期以来关于SN 1993J及其原始系统性质的.
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