核心坍缩前的巨型外爆
天体物理学
2008-11-26 v2
摘要
恒星的死亡会产生多种超新星，其类型与爆炸星的结构有关。虽然已报告多例Type II超新星的前体星,但迄今为止尚无关于氢缺失型Type Ib和Ic超新星的直接信息。我们在此报告，异常Type Ib超新星SN2006jc的发生地与2004年一次明亮光学暂态事件的空间位置吻合。通过对超新星的光谱和光度监测，我们认为其前体为位于氦丰富 circumstellar介质中的碳氧型温热星。关于这一外爆现象，存在多种可能解释。其特征类似于60-100太阳质量恒星的Luminous Blue星(LBV)巨型外爆,但SN2006jc的前体缺乏氢和氦。若某温热星发生LBV样外爆,则本例为首次观测证据。或者，由一颗在2004年发生外爆的LBV星与SN2006jc一起爆发的温热星组成的巨型双星系统也能解释观测结果。
引用
@article{arxiv.astro-ph/0703663,
title = {A giant outburst two years before the core-collapse of a massive star},
author = {A. Pastorello and S. J. Smartt and S. Mattila and J. J. Eldridge and D. Young and K. Itagaki and H. Yamaoka and H. Navasardyan and S. Valenti and F. Patat and I. Agnoletto and T. Augusteijn and S. Benetti and E. Cappellaro and T. Boles and J. -M. Bonnet-Bidaud and M. T. Botticella and F. Bufano and C. Cao and J. Deng and M. Dennefeld and N. Elias-Rosa and A. Harutyunyan and F. P. Keenan and T. Iijima and V. Lorenzi and P. A. Mazzali and X. Meng and S. Nakano and T. B. Nielsen and J. V. Smoker and V. Stanishev and M. Turatto and D. Xu and L. Zampieri},
journal= {arXiv preprint arXiv:astro-ph/0703663},
year = {2008}
}
备注
15 pages, 4 figures (supplementary information included). Originally submitted on Nov. 24, 2006; twice revised. Final version submitted to Nature