Limits on mass outflow from optical tidal disruption events
Limits on mass outflow from optical tidal disruption events
复制标题
光潮汐破坏事件造成的质量流出的限制
DOI:
10.1093/mnras/stab240
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发表时间:
2021
期刊:
影响因子:
--
通讯作者:
Tatsuya Matsumoto and Tsvi Piran
中科院分区:
文献类型:
--
作者:
Zhang An;Kawashima Daisuke;Obara Hiromichi;Takei Masahiro;Tatsuya Matsumoto and Tsvi Piran
The discovery of optical/UV (ultraviolet) tidal disruption events (TDEs) was surprising. The expectation was that, upon returning to the pericentre, the stellar-debris stream will form a compact disc that will emit soft X-rays. Indeed, the first TDEs were discovered in this energy band. A common explanation for the optical/UV events is that surrounding optically thick matter reprocesses the disc’s X-ray emission and emits it from a large photosphere. If accretion follows the super-Eddington mass infall rate, it would inevitably result in an energetic outflow, providing naturally the reprocessing matter. We describe here a new method to estimate, using the observed luminosity and temperature, the mass and energy of outflows from optical transients. When applying this method to a sample of supernovae, our estimates are consistent with a more detailed hydrodynamic modelling. For the current sample of a few dozen optical TDEs, the observed luminosity and temperature imply outflows that are significantly more massive than typical stellar masses, posing a problem to this common reprocessing picture.
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发表时间:
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期刊:
The Astrophysical Journal Letters
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10.3847/1538-4357/abbf4d
发表时间:
2020-07
期刊:
The Astrophysical Journal
影响因子:
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