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arXiv 2602.08574astro-ph.GA
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核星团中潮汐破坏事件和致密天体坠落的建模

Modeling Tidal Disruption Events and Compact Object Plunges in Nuclear Star Clusters

Heidelberg University(海德堡大学);New York University Abu Dhabi(阿布扎比纽约大学);Fesenkov Astrophysical Institute(费森可夫天体物理研究所);National Astronomical Observatories, Chinese Academy of Sciences(中国科学院国家天文台);Peking University(北京大学)

Philip Cho, Kai Wu, Francesco Flammini Dotti, Taras Panamarev, Rainer Spurzem

AI总结:

研究核星团中潮汐破坏事件和致密天体坠落对超大质量黑洞增长的影响,通过改进模型模拟发现吸积峰值和抑制机制。

摘要:

我们研究了宿主中央超大质量黑洞(SMBH)的核星团中的潮汐破坏事件(TDEs)和致密天体吞噬,重点关注其在SMBH增长中的作用。使用直接N-body代码NBODY6++GPU的STARDISK版本,我们进行了两项改进模型的试点模拟:一个用于TDEs的物质回落模型,另一个基于轨道衰减时间尺度的致密天体坠落模型。我们的结果表明,通过TDEs的物质吸积在前2Myr内达到峰值,对于更高的初始SMBH质量,其衰减速度更快,约有半数被吸积的破坏恒星碎片。致密天体吸积主要局限于轨道近日点在4到27个Schwarzschild半径之间的轨道,并且当应用吞噬标准时,其被抑制了数量级。

英文摘要:

We study tidal disruption events (TDEs) and compact object inspirals in nuclear star clusters (NSCs) hosting a central supermassive black hole (SMBH), focusing on their role in SMBH growth. Using the STARDISK version of the direct N-body code NBODY6++GPU, we perform pilot simulations with two improved models: one for mass fallback from TDEs and another for compact object plunges based on orbital decay timescales. Our results show that mass accretion via TDEs peaks within the first 2 Myr and decreases more rapidly for higher initial SMBH masses, with roughly half the disrupted stellar debris being accreted. Compact object accretion is confined mostly to orbits with pericenters between 4 and 27 Schwarzschild radii and is suppressed by an order of magnitude when inspiral criteria are applied.

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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