Ia型超新星遗迹SNR 0509-67.5的中心没有任何前伴星，M_V=+8.4
The center of the Type Ia supernova remnant SNR 0509-67.5 is empty of any ex-companion star to M_V=+8.4
摘要：
Ia型超新星（SNe Ia）被认为起源于一颗白矮星的爆炸。爆炸可能是由两颗白矮星的合并（“双简并”起源）或来自伴星的质量转移（“单简并”路径）引发的。祖先的身份仍然是有争议的;例如，最近反对单退化起源的论点已被广泛拒绝。区分双简并和单简并祖星的一种方法是观察已知的Ia超新星遗迹的中心，看看是否存在任何以前的伴星。一颗可能是第谷超新星前身的伴星已经被确认，但这一说法仍有争议。本文报道了大麦云星云超新星遗迹SNR 0509-67.5（根据其光回波，它是400+-50年前的Ia型超新星的位置）的中心区域在半径1.43”的极端99.73%区域内不包含前伴星，极限星等为V=26.9（M_V=+8.4）。缺乏任何前伴星的深度限制排除了所有已发表的单简并模型。唯一剩下的可能性是这个Ia超新星的祖先是一个双简并系统。
英文摘要：
Type Ia supernova (SNe Ia) are thought to originate in the explosion of a white dwarf. The explosion could be triggered by the merger of two white dwarfs ('double-degenerate' origin), or by mass transfer from a companion star (the 'single-degenerate' path). The identity of the progenitor is still controversial; for example, a recent argument against the single-degenerate origin has been widely rejected. One way to distinguish between the double- and single-degenerate progenitors is to look at the center of a known SN Ia remnant to see whether any former companion star is present. A likely ex-companion star for the progenitor of Tycho's supernova has been identified, but that claim is still controversial. Here we report that the central region of the supernova remnant SNR 0509-67.5 (the site of a Type Ia supernova 400+-50 years ago, based on its light echo) in the Large Magellanic Cloud contains no ex-companion star to a limit of V=26.9 magnitude (M_V=+8.4) within the extreme 99.73% region with radius 1.43". The lack of any ex-companion star to deep limits rules out all published single-degenerate models. The only remaining possibility is that the progenitor for this particular SN Ia was a double-degenerate system.
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。
