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The late flare in tidal disruption events due to the interaction of disk wind with dusty torus
Journal of High Energy Astrophysics ( IF 3.8 ) Pub Date : 2021-08-17 , DOI: 10.1016/j.jheap.2021.06.001
Jialun Zhuang 1 , Rong-Feng Shen 1
Affiliation  

A late (t ∼ 1,500 days) multi-wavelength (UV, optical, IR, and X-ray) flare was found in PS1-10adi, a tidal disruption event (TDE) candidate that took place in an active galactic nucleus (AGN). TDEs usually involve super-Eddington accretion, which drives fast mass outflow (disk wind). So here we explore a possible scenario that such a flare might be produced by the interaction of the disk wind with a dusty torus for TDEs in AGN. Due to the high velocity of the disk wind, strong shocks will emerge and convert the bulk of the kinetic energy of the disk wind to radiation. We calculate the dynamics and then predict the associated radiation signatures, taking into account the widths of the wind and torus. We compare our model with the bolometric light curve of the late flare in PS1-10adi constructed from observations. We find from our modeling that the disk wind has a total kinetic energy of about 1051 erg and a velocity of 0.1 c (i.e., a mass of 0.3 M); the gas number density of the clouds in the torus is 3×107 cm3. Observation of such a late flare can be an evidence of the disk wind in TDEs and can be used as a tool to explore the nuclear environment of the host.



中文翻译:

由于盘状风与尘土环面相互作用导致的潮汐中断事件中的晚期耀斑

在 PS1-10adi 中发现了晚(t ∼ 1,500 天)多波长(UV、光学、IR 和 X 射线)耀斑,PS1-10adi 是在活动星系核 (AGN) 中发生的潮汐干扰事件 (TDE) 候选者. TDE 通常涉及超爱丁顿吸积,这会驱动快速的质量外流(盘风)。因此,我们在这里探讨了一种可能的情况,即这种耀斑可能是由盘状风与 AGN 中 TDE 的尘土环面相互作用产生的。由于盘风的速度很高,会产生强烈的冲击,并将盘风的大部分动能转化为辐射。我们计算动力学,然后预测相关的辐射特征,同时考虑到风和环面的宽度。我们将我们的模型与根据观测构建的 PS1-10adi 中晚期耀斑的热光曲线进行比较。51 erg 和 0.1 c 的速度(即质量为 0.3); 环面中云的气体数密度为3×107 厘米-3. 对这种晚期耀斑的观测可以作为 TDE 中盘状风的证据,并可用作探索宿主核环境的工具。

更新日期:2021-08-24
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