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Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/3970
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dc.contributor.authorSethi, S.K.-
dc.contributor.authorHaiman, Zoltan-
dc.contributor.authorPandey, Kanhaiya L.-
dc.date.accessioned2011-04-01T06:14:50Z-
dc.date.available2011-04-01T06:14:50Z-
dc.date.issued2010-08-31-
dc.identifier.citationAstronomical Journal, 2010, Vol. 721, p615en
dc.identifier.issn0004-637X-
dc.identifier.issn1538-4357 (Online)-
dc.identifier.urihttp://hdl.handle.net/2289/3970-
dc.descriptionRestricted Access. An open-access version is available at arXiv.org (one of the alternative locations)en
dc.description.abstractIt has been proposed that primordial gas in early dark matter halos, with virial temperatures T vir gsim 104 K, can avoid fragmentation and undergo rapid collapse, possibly resulting in a supermassive black hole. This requires the gas to avoid cooling and to remain at temperatures near T ~ 104 K. We show that this condition can be satisfied in the presence of a sufficiently strong primordial magnetic field, which heats the collapsing gas via ambipolar diffusion. If the field has a strength above midB mid gsim3.6 (comoving) nG, the collapsing gas is kept warm (T ~ 104 K) until it reaches the critical density n crit ≈ 103 cm-3 at which the rotovibrational states of H2 approach local thermodynamic equilibrium. H2 cooling then remains inefficient and the gas temperature stays near ~104 K, even as it continues to collapse at higher densities. The critical magnetic field strength required to permanently suppress H2 cooling is somewhat higher than the upper limit of ~2 nG from the cosmic microwave background. However, it can be realized in the rare gsim(2-3)σ regions of the spatially fluctuating B field; these regions contain a sufficient number of halos to account for z ≈ 6 quasar black holes.en
dc.language.isoenen
dc.publisherIOP Publishing Ltd.en
dc.relation.urihttp://adsabs.harvard.edu/abs/2010ApJ...721..615Sen
dc.relation.urihttp://arxiv.org/abs/1005.2942en
dc.relation.urihttp://dx.doi.org/10.1088/0004-637X/721/1/615en
dc.rights2010 IOP Publishing Limiteden
dc.titleSupermassive black hole formation at high redshifts through a primordial magnetic fielden
dc.typeArticleen
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