Measuring Stellar and Black Hole Masses of Tidal Disruption Events
Measuring Stellar and Black Hole Masses of Tidal Disruption Events
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DOI：
10.3847/1538-4357/abbf4d
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发表时间：
2020-07
期刊：
影响因子：
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通讯作者：
Taeho Ryu;J. Krolik;T. Piran
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文献类型：
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作者：
Taeho Ryu;J. Krolik;T. Piran
当一颗星星被超大质量黑洞潮汐破坏时，产生的耀斑有可能作为黑洞质量和星星质量的诊断。我们提出了一种新的方法，以实现这一潜力的基础上的物理模型的光学/紫外光的生产，其中冲击附近的远心碎片轨道耗散轨道能量，然后从该地区辐射。测量耀斑峰值处的光学/UV光度和色温直接导致两个质量。黑洞的质量主要取决于在峰值亮度时观测到的温度，而被破坏的星星的质量主要取决于峰值亮度。我们介绍TDEmass，一种方法来推断黑洞和恒星质量给定这两个输入量。使用TDEmass，我们发现，对于21个测量良好的事件，黑洞质量在5 × 105和107 M之间，初始质量在0.6和13 M之间。一个基于Python的TDEmass开源工具可以在https://github.com/taehoryu/TDEmass.git上找到。
The flare produced when a star is tidally disrupted by a supermassive black hole holds potential as a diagnostic of both the black hole mass and the star mass. We propose a new method to realize this potential based upon a physical model of optical/UV light production in which shocks near the apocenters of debris orbits dissipate orbital energy, which is then radiated from that region. Measurement of the optical/UV luminosity and color temperature at the peak of the flare leads directly to the two masses. The black hole mass depends mostly on the temperature observed at peak luminosity, while the mass of the disrupted star depends mostly on the peak luminosity. We introduce TDEmass, a method to infer the black hole and stellar masses given these two input quantities. Using TDEmass, we find, for 21 well-measured events, black hole masses between 5 × 105 and 107 M ⊙ and disrupted stars with initial masses between 0.6 and 13 M ⊙. An open-source python-based tool for TDEmass is available at https://github.com/taehoryu/TDEmass.git.