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arXiv 1012.3089astro-ph.SR
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来自SDSS-X的后共包络双星:低质量白矮星的起源

Post-common envelope binaries from SDSS-X: The origin of low-mass white dwarfs

Alberto Rebassa-Mansergas, Ada Nebot Gomez-Moran, Matthias Schreiber, Jonathan Girven, Boris Gansicke

摘要:

本文给出了直接从观测中获得的大量均匀后共包络双星和宽白矮星-主序星双星的第一个白矮星质量分布。这两种分布在统计上是独立的,PCEB显示出一个明确的浓度系统对低质量的分布端,和白矮星的质量分布宽WDMS双星是类似的单白矮星。我们的研究结果提供了证据,大多数低质量(Mwd <0.5 Msun)的白矮星形成于密近双星。

英文摘要:

We present the first white dwarf mass distributions of a large and homogeneous sample of post-common envelope binaries (PCEBs) and wide white dwarf-main sequence binaries (WDMS) directly obtained from observations. Both distributions are statistically independent, with PCEBs showing a clear concentration of systems towards the low-mass end of the distribution, and the white dwarf mass distribution of wide WDMS binaries being similar to those of single white dwarfs. Our results provide evidence that the majority of low-mass (Mwd < 0.5Msun) white dwarfs are formed in close binaries.

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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