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A Massive Hypergiant Star As The Progenitor Of The Supernova Sn 2005gl

机译：作为超新星Sn 2005gl的祖先的巨型超巨星

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摘要

Our understanding of the evolution of massive stars before their final explosions as supernovae is incomplete, from both an observational and a theoretical standpoint. A key missing piece in the supernova puzzle is the difficulty of identifying and studying progenitor stars. In only a single case-that of supernova SN 1987A in the Large Magellanic Cloud-has a star been detected at the supernova location before the explosion, and been subsequently shown to have vanished after the supernova event. The progenitor of SN 1987A was a blue supergiant, which required a rethink of stellar evolution models. The progenitor of supernova SN 2005gl was proposed to be an extremely luminous object, but the association was not robustly established (it was not even clear that the putative progenitor was a single luminous star). Here we report that the previously proposed object was indeed the progenitor star of SN 2005gl. This very massive star was likely a luminous blue variable that standard stellar evolution predicts should not have exploded in that state.
机译：从观测和理论的角度，我们对大质量恒星在最终爆炸前作为超新星的演化的理解还不完整。超新星难题中一个关键的缺失部分是识别和研究祖先恒星的困难。仅在一个案例中（大麦哲伦星云中的超新星SN 1987A），在爆炸前就在超新星的位置检测到一颗恒星，随后发现该恒星在超新星事件后消失了。 SN 1987A的祖先是蓝色巨人，需要重新思考恒星演化模型。提出了超新星SN 2005gl的祖先是一个非常发光的天体，但是这种关联并没有得到有力的建立（甚至还不清楚推定的祖先是单个发光的恒星）。在这里我们报告说，先前提出的天体确实是SN 2005gl的祖先星。这颗非常大的恒星很可能是标准恒星演化所预测的那种状态下不应该爆炸的发光蓝色变量。

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  • 来源
    《Nature》 |2009年第7240期|p.865-867|共3页
  • 作者

    A. Gal-Yam; D.C. Leonard;

  • 作者单位

    Benoziyo Center for Astrophysics , Faculty of Physics, The Weizmann Institute of Science, Rehovot 76100, Israel;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 自然科学总论;
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