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arXiv 1702.07730astro-ph.HE
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总潮汐扰动事件和部分潮汐扰动事件之间的细微差别

The fine line between total and partial tidal disruption events

Deborah Mainetti, Alessandro Lupi, Sergio Campana, Monica Colpi, Eric R. Coughlin, James Guillochon, Enrico Ramirez-Ruiz

摘要:

潮汐破裂事件产生的耀斑是星系中心静止黑洞的独特示踪物。这些耀斑的出现对恒星是否完全或部分被破坏非常敏感,在本文中,我们试图确定恒星与黑洞的临界距离(r_d),使我们能够区分这两种结果。我们在这里执行无网格有限质量,传统的,和现代的光滑粒子流体动力学模拟的恒星-黑洞紧密接触,目的是检查的值r_d取决于模拟技术。我们发现临界距离(或所谓的临界破裂参数β_d)仅弱地依赖于所采用的模拟方法,对于γ =5/3的多面体,β_d=0.92 \pm 0.02;对于γ =4/3的多面体,β_d=2.01 \pm 0.01。

英文摘要:

Flares from tidal disruption events are unique tracers of quiescent black holes at the centre of galaxies. The appearance of these flares is very sensitive to whether the star is totally or partially disrupted, and in this paper we seek to identify the critical distance of the star from the black hole (r_d) that enables us to distinguish between these two outcomes. We perform here Mesh-free Finite Mass, traditional, and modern Smoothed Particle Hydrodynamical simulations of star-black hole close encounters, with the aim of checking if the value of r_d depends on the simulation technique. We find that the critical distance (or the so-called critical disruption parameter beta_d) depends only weakly on the adopted simulation method, being beta_d=0.92\pm 0.02 for a gamma=5/3 polytrope and beta_d=2.01\pm 0.01 for a gamma=4/3 polytrope.

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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