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Gravitational recoil: effects on massive black hole occupation fraction over cosmic time

dc.contributor.authorVolonteri, Martaen_US
dc.contributor.authorGültekin, Kayhanen_US
dc.contributor.authorDotti, Massimoen_US
dc.date.accessioned2011-01-31T17:25:15Z
dc.date.available2011-08-02T18:19:15Zen_US
dc.date.issued2010-06-01en_US
dc.identifier.citationVolonteri, Marta; Gültekin, Kayhan; Dotti, Massimo; (2010). "Gravitational recoil: effects on massive black hole occupation fraction over cosmic time." Monthly Notices of the Royal Astronomical Society 404(4): 2143-2150. <http://hdl.handle.net/2027.42/79074>en_US
dc.identifier.issn0035-8711en_US
dc.identifier.issn1365-2966en_US
dc.identifier.urihttps://hdl.handle.net/2027.42/79074
dc.description.abstractWe assess the influence of massive black hole (MBH) ejections from galaxy centres due to gravitational radiation recoil, along the cosmic merger history of the MBH population. We discuss the ‘danger’ of recoil for MBHs as a function of different MBH spin-orbit configurations and of the host halo cosmic bias, and on how that reflects on the occupation fraction of MBHs. We assess ejection probabilities for mergers occurring in a gas-poor environment, in which the MBH binary coalescence is driven by stellar dynamical processes and the spin-orbit configuration is expected to be isotropically distributed. We contrast this case with the ‘aligned’ case. The latter is the more realistic situation for gas-rich, i.e. ‘wet’, mergers, which are expected for high-redshift galaxies. We find that if all haloes at z > 5–7 host an MBH, the probability of the Milky Way (or similar size galaxy) to host an MBH today is less than 50 per cent, unless MBHs form continuously in galaxies. The occupation fraction of MBHs, intimately related to halo bias and MBH formation efficiency, plays a crucial role in increasing the retention fraction. Small haloes, with shallow potential wells and low escape velocities, have a high ejection probability, but the MBH merger rate is very low along their galaxy formation merger hierarchy: MBH formation processes are likely inefficient in such shallow potential wells. Recoils can decrease the overall frequency of MBHs in small galaxies to ∼60 per cent, while they have little effect on the frequency of MBHs in large galaxies (at most a 20 per cent effect).en_US
dc.format.extent809122 bytes
dc.format.extent3106 bytes
dc.format.mimetypeapplication/pdf
dc.format.mimetypetext/plain
dc.publisherBlackwell Publishing Ltden_US
dc.subject.otherBlack Hole Physicsen_US
dc.subject.otherGalaxies: Formationen_US
dc.subject.otherCosmology: Theoryen_US
dc.titleGravitational recoil: effects on massive black hole occupation fraction over cosmic timeen_US
dc.typeArticleen_US
dc.rights.robotsIndexNoFollowen_US
dc.subject.hlbsecondlevelAstronomyen_US
dc.subject.hlbtoplevelScienceen_US
dc.description.peerreviewedPeer Revieweden_US
dc.contributor.affiliationumDepartment of Astronomy, University of Michigan, Ann Arbor, MI 48109, USAen_US
dc.contributor.affiliationotherMax-Planck-Institut für Astrophysik, Garching bei München, 85740, Germanyen_US
dc.description.bitstreamurlhttp://deepblue.lib.umich.edu/bitstream/2027.42/79074/1/j.1365-2966.2010.16431.x.pdf
dc.identifier.doi10.1111/j.1365-2966.2010.16431.xen_US
dc.identifier.sourceMonthly Notices of the Royal Astronomical Societyen_US
dc.owningcollnameInterdisciplinary and Peer-Reviewed


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