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Peer-Reviewed Publication

American Association for the Advancement of Science (AAAS)

An Unusual White Dwarf May Be a Supernova Leftover

image: Image of the accretion disk: A snapshot of the binary star system before the violent supernova explosion blew it to pieces. This material relates to a paper that appeared in the 18 August 2017, issue of <i>Science</i>, published by AAAS. The paper, by S. Vennes at Astronomical Institute of Czech Academy of Sciences in Ondrejov, Czech Republic, and colleagues was titled, "An unusual white dwarf star may be a surviving remnant of a subluminous Type Ia supernova." view more 

Credit: Copyright Russell Kightley (

天文学家在我们的星系中发现了一颗白矮星,它可能是近来发现的一类超新星的残余。Stephane Vennes和同事说,这颗被称作LP 40-365的不同寻常的白矮星的性质可帮助科学家们确定这类不同寻常的超新星是如何产生的。常见的一类爆炸的恒星(被称作Ia型超新星)有着相当均一的亮度,后者对宇宙学研究颇为有用。Ia型超新星是由发生热核爆炸的白矮星的彻底摧毁产生的。最近,天文学家发现了一种相对较暗的超新星(被称作Iax型),它看上去像Ia型超新星,但其亮度要昏暗得多。Iax型超新星可能是由在这类爆炸中的白矮星的部分催毁形成的。如果该解释正确,那么有部分白矮星会作为残余物幸存下来。科学家们确认,LP 40-365是一颗不同寻常的白矮星,它的质量小、速度快,成分奇怪,这些恰好都是人们所期待的Iax型事件后残余星体的性质。据他们计算,该爆炸的时间肯定发生在5百万至5千万年前之间。


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