Accretion onto Intermediate-Mass Black Holes in Dense Protogalactic Clouds

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dc.contributor.utaustinauthorMilosavljevi?, Milošen_US
dc.contributor.utaustinauthorCouch, Sean M.en_US
dc.contributor.utaustinauthorBromm, Volkeren_US
dc.creatorMilosavljevi?, Milošen_US
dc.creatorCouch, Sean M.en_US
dc.creatorBromm, Volkeren_US
dc.date.accessioned2016-10-28T19:37:42Z
dc.date.available2016-10-28T19:37:42Z
dc.date.issued2009-05en_US
dc.description.abstractWe present the first results from two-dimensional simulations of radiatively efficient accretion of metal-free gas onto intermediate-mass black holes. We fix the shape of the spectral energy distribution of the radiation produced near the event horizon and study the structure of the irradiated low-angular-momentum accretion flow over 3 orders of magnitude in radius from the black hole, 10(14)-10(17) cm for a 100 M(circle dot) black hole. The luminosity of the central source is made to be proportional to the rate at which gas accretes across the inner boundary, which we set just inside the sonic radius. We find that photoionization heating and radiation pressure modify the structure of the flow. When the ambient gas density is 10(7) cm(-3), accretion is intermittent and on average reduced to 32% of the Eddington-limited rate, over 2 orders of magnitude below the "Bondi" rate evaluated ignoring radiation, in agreement with theoretical models. Even if the vicinity of the black hole is supplied with high-density gas, accretion is rendered inefficient through heating and radiation pressure.en_US
dc.description.departmentAstronomyen_US
dc.description.sponsorshipNSF AST-0708795en_US
dc.identifierdoi:10.15781/T2JQ0SX8R
dc.identifier.citationMilosavljevi?, Miloš, Sean M. Couch, and Volker Bromm. "Accretion onto intermediate-mass black holes in dense protogalactic clouds." The Astrophysical Journal Letters, Vol. 696, No. 2 (May, 2009): L146.en_US
dc.identifier.doi10.1088/0004-637x/696/2/l146en_US
dc.identifier.issnen_US
dc.identifier.urihttp://hdl.handle.net/2152/43079
dc.language.isoEnglishen_US
dc.relation.ispartofen_US
dc.relation.ispartofserialAstrophysical Journal Lettersen_US
dc.rightsAdministrative deposit of works to Texas ScholarWorks: This works author(s) is or was a University faculty member, student or staff member; this article is already available through open access or the publisher allows a PDF version of the article to be freely posted online. The library makes the deposit as a matter of fair use (for scholarly, educational, and research purposes), and to preserve the work and further secure public access to the works of the University.en_US
dc.rights.restrictionOpenen_US
dc.subjectaccretion, accretion disksen_US
dc.subjectblack hole physicsen_US
dc.subjectgalaxies: activeen_US
dc.subjecthydrodynamicsen_US
dc.subjectmethods: numericalen_US
dc.subjectquasars: generalen_US
dc.subjectx-ray sourcesen_US
dc.subjectinterstellar-mediumen_US
dc.subjectradiative feedbacken_US
dc.subjectflowsen_US
dc.subjectionizationen_US
dc.subjectgalaxiesen_US
dc.subjectquasarsen_US
dc.subjectgrowthen_US
dc.subjectgasen_US
dc.subjecttransporten_US
dc.subjectastronomy & astrophysicsen_US
dc.titleAccretion onto Intermediate-Mass Black Holes in Dense Protogalactic Cloudsen_US
dc.typeArticleen_US

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