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arXiv 0907.2919astro-ph.CO
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从宇宙学初始条件形成布居III双星

The Formation of Population III Binaries from Cosmological Initial Conditions

Matthew J. Turk, Tom Abel, Brian W. O'Shea

摘要:

先前的高分辨率宇宙学模拟预测,早期宇宙中出现的第一批恒星质量非常大,并且是孤立形成的。在这里,我们讨论一个宇宙学模拟,其中中心50太阳质量团分裂成两个核心,质量比为2:1,其中一个碎片坍缩到密度为10^{-8} g/cc。第二个碎片,在800天文单位的距离,也是光学厚到它自己的冷却辐射从分子氢线,但仍然能够冷却通过碰撞诱导发射。这两个高密度的峰将在10^5年的时间内继续从周围的冷气体库中吸积,并可能形成一个双星系统。

英文摘要:

Previous high resolution cosmological simulations predict the first stars to appear in the early universe to be very massive and to form in isolation. Here we discuss a cosmological simulation in which the central 50 solar mass clump breaks up into two cores, having a mass ratio of two to one, with one fragment collapsing to densities of 10^{-8} g/cc. The second fragment, at a distance of 800 astronomical units, is also optically thick to its own cooling radiation from molecular hydrogen lines, but is still able to cool via collision-induced emission. The two dense peaks will continue to accrete from the surrounding cold gas reservoir over a period of 10^5 years and will likely form a binary star 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。

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