Line-force driven wind from a thin disk in tidal disruption event

De-Fu Bu; Xiao-Hong Yang; Liang Chen; Chenwei Yang; Guobin Mou

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arXiv · 2510.18657

Line-force driven wind from a thin disk in tidal disruption event

De-Fu Bu·Xiao-Hong Yang·Liang Chen·Chenwei Yang·Guobin Mou

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Abstract

Winds from the accretion disk in tidal disruption events (TDEs) play a key role in determining the radiation of TDEs. The winds from the super-Eddington accretion phase in TDEs have recently been studied. However, properties of the winds from the sub-Eddington accretion disk in TDEs are not clear. We aim to investigate properties of winds from the circularized sub-Eddington accretion disk in TDEs. We study the line force driven accretion disk wind. We perform two-dimensional hydrodynamic simulations using the PLUTO code to study the line force driven wind from the circularized accretion disk around a $10^6$ solar mass black hole in TDEs. We find that although the disk has a very small size in TDEs, strong wind can be driven by line force when the disk have luminosity higher than $20\%$ of the Eddington luminosity. The maximum velocity of wind can be as high as $0.3$ times the speed of light. The kinematic power of wind is in the range of $1\%-6\%$ times the Eddington luminosity. Strong wind can be driven by line force from the thin disk around a $10^6$ solar mass black hole in TDEs. We briefly discuss the possible radio emission from the shock when the wind collides with the surrounding medium.

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De-Fu Bu, Xiao-Hong Yang, Liang Chen, Chenwei Yang, Guobin Mou. 2025-10-21. Line-force driven wind from a thin disk in tidal disruption event. https://arxiv.org/abs/2510.18657

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