Title:
Ultra-Close Tidal Disruption Events with Prompt Hyperaccretion
Ultra-Close Tidal Disruption Events with Prompt Hyperaccretion
| dc.contributor.advisor | Laguna, Pablo | |
| dc.contributor.author | Evans, Christopher | |
| dc.contributor.committeeMember | Shoemaker, Deirdre | |
| dc.contributor.department | Physics | |
| dc.date.accessioned | 2015-08-18T19:15:07Z | |
| dc.date.available | 2015-08-18T19:15:07Z | |
| dc.date.created | 2015-05 | |
| dc.date.issued | 2015-08-18 | |
| dc.date.submitted | May 2015 | |
| dc.date.updated | 2015-08-18T19:15:08Z | |
| dc.description.abstract | A bright flare from a galactic nucleus followed at late times by a t^-5/3 decay in luminosity is often considered to be the signature of a tidal disruption of a star by a massive black hole. The flare and afterglow are produced when the stream of stellar debris released by the disruption returns to the vicinity of 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 10^6 solar mass black hole, the time between the disruption of the star and the formation of the accretion torus could be years. Presented here are 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 approximately 100 solar masses per year. | |
| dc.description.degree | Undergraduate | |
| dc.format.mimetype | application/pdf | |
| dc.identifier.uri | http://hdl.handle.net/1853/53747 | |
| dc.language.iso | en_US | |
| dc.publisher | Georgia Institute of Technology | |
| dc.subject | Black holes | |
| dc.subject | Accretion | |
| dc.subject | Tidal disruption | |
| dc.title | Ultra-Close Tidal Disruption Events with Prompt Hyperaccretion | |
| dc.type | Text | |
| dc.type.genre | Undergraduate Thesis | |
| dspace.entity.type | Publication | |
| local.contributor.corporatename | College of Sciences | |
| local.contributor.corporatename | School of Physics | |
| local.contributor.corporatename | Undergraduate Research Opportunities Program | |
| local.relation.ispartofseries | Undergraduate Research Option Theses | |
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| thesis.degree.level | Undergraduate |