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arXiv 1302.4634astro-ph.HE
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RX J0648 .0--4418:自转最快的白矮星

RX J0648.0--4418: the fastest-spinning white dwarf

Sandro Mereghetti

摘要:

RX J 0648.0 -4418是一颗共包络后X射线双星,由一颗热亚矮星和一颗最大质量的白矮星组成,动力学质量测量值为1.28+/-0.05 M_sun。这颗白矮星的自转周期为13.2秒,自转速度比激变变星AE Aqr中的白矮星快两倍多。这两个双星系统目前的性质,以及它们未来的演化,是相当不同的,尽管都包含一个快速旋转的白矮星。RX J0648.0-4418可能是Ia型超新星或非循环毫秒超新星的前身。

英文摘要:

RX J0648.0-4418 is a post common-envelope X-ray binary composed of a hot subdwarf and one of the most massive white dwarfs with a dynamical mass measurement (1.28+/-0.05 M_sun). This white dwarf, with a spin period of 13.2 s, rotates more than twice faster than the white dwarf in the cataclysmic variable AE Aqr. The current properties of these two binaries, as well as their future evolution, are quite different, despite both contain a fast-spinning white dwarf. RX J0648.0-4418 could be the progenitor of either a Type Ia supernova or of a non-recycled millisecond pulsars.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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