Ultra-Close Encounters of Stars With Massive Black Holes: Tidal Disruption Events With Prompt Hyperaccretion
arXiv:1502.05740 · doi:10.1088/2041-8205/805/2/L19
Abstract
A bright flare from a galactic nucleus followed at late times by a decay in luminosity is often considered the signature of the complete tidal disruption of a star by a massive black hole. The flare and power-law decay are produced when the stream of bound debris returns to the black hole, self-intersects, and eventually forms an accretion disk or torus. In the canonical scenario of a solar-type star disrupted by a black hole, the time between the disruption of the star and the formation of the accretion torus could be years. We present fully general relativistic simulations of a new class of tidal disruption events involving ultra-close encounters of solar-type stars with intermediate mass black holes. In these encounters, a thick disk forms promptly after disruption, on timescales of hours. After a brief initial flare, the accretion rate remains steady and highly super-Eddington for a few days at .
5 pages, 1 table, 4 figures. Accepted for publication ApJL
References in corpus (7)
- An ultraviolet-optical flare from the tidal disruption of a helium-rich stellar core
- A Continuum of H- to He-Rich Tidal Disruption Candidates With a Preference for E+A Galaxies
- Stellar disruption by a supermassive black hole: is the light curve really proportional to ?
- A Tidal Disruption Flare in Abell 1689 from an Archival X-ray Survey of Galaxy Clusters
- Red giant stellar collisions in the Galactic Centre
- Tidal Disruption and Magnetic Flux Capture: Powering a Jet from a Quiescent Black Hole
- Tidal disruption of a super-Jupiter by a massive black hole