Dual black holes in merger remnants – I. Linking accretion to dynamics
dc.contributor.author | Dotti, Massimo | en_US |
dc.contributor.author | Ruszkowski, Mateusz | en_US |
dc.contributor.author | Paredi, L. | en_US |
dc.contributor.author | Colpi, M. | en_US |
dc.contributor.author | Volonteri, Marta | en_US |
dc.contributor.author | Haardt, Francesco | en_US |
dc.date.accessioned | 2010-06-01T18:37:43Z | |
dc.date.available | 2010-06-01T18:37:43Z | |
dc.date.issued | 2009-07-01 | en_US |
dc.identifier.citation | Dotti, M.; Ruszkowski, M.; Paredi, L.; Colpi, M.; Volonteri, M.; Haardt, F. (2009). "Dual black holes in merger remnants – I. Linking accretion to dynamics." Monthly Notices of the Royal Astronomical Society 396(3): 1640-1646. <http://hdl.handle.net/2027.42/71830> | en_US |
dc.identifier.issn | 0035-8711 | en_US |
dc.identifier.issn | 1365-2966 | en_US |
dc.identifier.uri | https://hdl.handle.net/2027.42/71830 | |
dc.description.abstract | We study the orbital evolution and accretion history of massive black hole (MBH) pairs in rotationally supported circumnuclear discs up to the point where MBHs form binary systems. Our simulations have high resolution in mass and space which, for the first time, makes it feasible to follow the orbital decay of a MBH either counter- or corotating with respect to the circumnuclear disc. We show that a moving MBH on an initially counter-rotating orbit experiences an ‘orbital angular momentum flip’ due to the gas-dynamical friction, i.e. it starts to corotate with the disc before a MBH binary forms. We stress that this effect can only be captured in very high resolution simulations. Given the extremely large number of gas particles used, the dynamical range is sufficiently large to resolve the Bondi–Hoyle–Lyttleton radii of individual MBHs. As a consequence, we are able to link the accretion processes to the orbital evolution of the MBH pairs. We predict that the accretion rate is significantly suppressed and extremely variable when the MBH is moving on a retrograde orbit. It is only after the orbital angular momentum flip has taken place that the secondary rapidly ‘lights up’ at which point both MBHs can accrete near the Eddington rate for a few Myr. The separation of the double nucleus is expected to be around ≲10 pc at this stage. We show that the accretion rate can be highly variable also when the MBH is corotating with the disc (albeit to a lesser extent) provided that its orbit is eccentric. Our results have significant consequences for the expected number of observable double active galactic nuclei at separations of ≲100 pc. | en_US |
dc.format.extent | 551821 bytes | |
dc.format.extent | 3109 bytes | |
dc.format.mimetype | application/pdf | |
dc.format.mimetype | text/plain | |
dc.publisher | Blackwell Publishing Ltd | en_US |
dc.rights | Journal compilation © 2009 RAS | en_US |
dc.subject.other | Black Hole Physics | en_US |
dc.subject.other | Hydrodynamics | en_US |
dc.subject.other | Galaxies: Evolution | en_US |
dc.subject.other | Galaxies: Nuclei | en_US |
dc.subject.other | Galaxies: Starburst | en_US |
dc.title | Dual black holes in merger remnants – I. Linking accretion to dynamics | en_US |
dc.type | Article | en_US |
dc.subject.hlbsecondlevel | Astronomy | en_US |
dc.subject.hlbtoplevel | Science | en_US |
dc.description.peerreviewed | Peer Reviewed | en_US |
dc.contributor.affiliationum | Department of Astronomy, University of Michigan, Ann Arbor, MI 48109, USA | en_US |
dc.contributor.affiliationum | The Michigan Center for Theoretical Physics, Ann Arbor, MI 48109, USA | en_US |
dc.contributor.affiliationother | Dipartimento di Fisica e Matematica, UniversitÀ dell'Insubria, Via Valleggio 11, 22100 Como, Italy | en_US |
dc.contributor.affiliationother | Dipartimento di Fisica G. Occhialini, UniversitÀ degli Studi di Milano Bicocca, Piazza della Scienza 3, 20126 Milano, Italy | en_US |
dc.description.bitstreamurl | http://deepblue.lib.umich.edu/bitstream/2027.42/71830/1/j.1365-2966.2009.14840.x.pdf | |
dc.identifier.doi | 10.1111/j.1365-2966.2009.14840.x | en_US |
dc.identifier.source | Monthly Notices of the Royal Astronomical Society | en_US |
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