Institute of Astronomy

Accretion Disks, Winds And Jets in Tidal Disruption Events

SpeakerTalk DateTalk Series
Jane Lixin Dai (University of Hong Kong)21 November 2019Institute of Astronomy Colloquia

Abstract

The tidal disruption of a star by a supermassive black hole provides a unique opportunity for us to study accretion physics around black holes. During a tidal disruption event (TDE), the rate of stellar debris supplied to the black hole can vary from two orders above the Eddington accretion rate to sub-Eddington within a year. This allows us to use TDEs to study super-Eddington accretion disk physics, as well as to probe the transition between the super-Eddington thick disk regime and the thin disk regime. In this talk, I will present our latest general-relativistic radiation magnetohydrodynamic simulations of super-Eddington accretion disks, and show how we can use these results to understand the evolution of disks, winds, jets and emissions in TDEs. I will also talk about our theoretical modeling of X-ray reflection from these simulated super-Eddington accretion disks.

Presentation

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