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dc.contributor.authorHayasaki, Kimitake
dc.contributor.authorStone, Nicholas
dc.contributor.authorLoeb, Abraham
dc.date.accessioned2019-09-26T15:01:47Z
dc.date.issued2013
dc.identifier.citationHayasaki, Kimitake, Nicholas Stone, and Abraham Loeb. 2013. “Finite, Intense Accretion Bursts from Tidal Disruption of Stars on Bound Orbits.” Monthly Notices of the Royal Astronomical Society 434 (2): 909–24. https://doi.org/10.1093/mnras/stt871.
dc.identifier.issn0035-8711
dc.identifier.issn1365-2966
dc.identifier.urihttp://nrs.harvard.edu/urn-3:HUL.InstRepos:41412213*
dc.description.abstractWe study accretion processes for tidally disrupted stars approaching supermassive black holes on bound orbits, by performing three-dimensional smoothed particle hydrodynamics simulations with a pseudo-Newtonian potential. We find that there is a critical value of the orbital eccentricity below which all the stellar debris remains bound to the black hole. For high but subcritical eccentricities, all the stellar mass is accreted on to the black hole in a finite time, causing a significant deviation from the canonical t(-5/3) mass fallback rate. When a star is on a moderately eccentric orbit and its pericentre distance is deeply inside the tidal disruption radius, there can be several orbit crossings of the debris streams due to relativistic precession. This dissipates orbital energy in shocks, allowing for rapid circularization of the debris streams and formation of an accretion disc. The resultant accretion rate greatly exceeds the Eddington rate and differs strongly from the canonical rate of t(-5/3). By contrast, there is little dissipation due to orbital crossings for the equivalent simulation with a purely Newtonian potential. This shows that general relativistic precession is crucial for accretion disc formation via circularization of stellar debris from stars on moderately eccentric orbits.
dc.language.isoen_US
dc.publisherOxford University Press
dash.licenseLAA
dc.titleFinite, intense accretion bursts from tidal disruption of stars on bound orbits
dc.typeJournal Article
dc.description.versionVersion of Record
dc.relation.journalMonthly Notices of the Royal Astronomical Society
dash.depositing.authorLoeb, Abraham::e022a3952362350ac8a0138f128a8be7::600
dc.date.available2019-09-26T15:01:47Z
dash.workflow.comments1Science Serial ID 66778
dc.identifier.doi10.1093/mnras/stt871
dash.source.volume434;2
dash.source.page909-924


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