arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 1402.6995astro-ph.COastro-ph.HE
收藏

从恒星质量种子超临界生长大质量黑洞

Super-Critical Growth of Massive Black Holes from Stellar-Mass Seeds

Piero Madau, Francesco Haardt, Massimo Dotti

摘要:

我们认为超临界吸积与角动量到恒星质量的黑洞作为一个可能的机制,从光种子生长十亿太阳质量的洞在早期。我们使用的辐射效率低的“薄盘”解决方案-平流,光学厚流,概括了标准的几何薄盘模型-显示如何温和的超爱丁顿间歇性吸积可能会显着缓解问题的组装第一个大质量黑洞时,宇宙年龄小于0.8 Gyr。由于非旋转以及快速旋转的孔周围的薄盘的低辐射效率,在这个制度的质量e-折叠的时间尺度几乎是独立的自旋参数。简要讨论了早期宇宙超临界增长的条件。

英文摘要:

We consider super-critical accretion with angular momentum onto stellar-mass black holes as a possible mechanism for growing billion-solar-mass holes from light seeds at early times. We use the radiatively-inefficient "slim disk" solution -- advective, optically thick flows that generalize the standard geometrically thin disk model -- to show how mildly super-Eddington intermittent accretion may significantly ease the problem of assembling the first massive black holes when the Universe was less than 0.8 Gyr old. Because of the low radiative efficiencies of slim disks around non-rotating as well as rapidly rotating holes, the mass e-folding timescale in this regime is nearly independent of the spin parameter. The conditions that may lead to super-critical growth in the early Universe are briefly discussed.

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。

↑