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dc.contributor.authorHaiman, Zoltan
dc.contributor.authorMadau, Piero
dc.contributor.authorLoeb, Abraham
dc.date.accessioned2019-09-24T12:04:05Z
dc.date.issued1999
dc.identifier.citationHaiman, Zoltan, Piero Madau, and Abraham Loeb. 1999. “Constraints from the Hubble Deep Field on High‐Redshift Quasar Models.” The Astrophysical Journal 514 (2): 535–43. https://doi.org/10.1086/306969.
dc.identifier.issn0004-637X
dc.identifier.issn1538-4357
dc.identifier.urihttp://nrs.harvard.edu/urn-3:HUL.InstRepos:41393237*
dc.description.abstractHigh-resolution, deep-imaging surveys are instrumental in setting constraints on semianalytical structure formation models in cold dark matter (CDM) cosmologies. We show here that the lack of unresolved B-band "dropouts" with V > 25 mag in the Hubble Deep Field appears to be inconsistent with the number of "miniquasars" expected if massive black holes form with a constant universal efficiency in all CDM halos. To reconcile the models with the data, a mechanism is needed that suppresses the formation of active nuclei in halos with circular velocities v(circ) less than or similar to 50-75 km s(-1). This feedback naturally arises because of the photoionization heating of the gas by the UV background. We consider several alternative effects that would help reducing the number of miniquasars and find that these cannot alone account for the observed lack of detections. If reddening by dust can be neglected at early epochs, consistency with the optical data also requires that the luminous extent of dwarf galaxies at high redshifts be larger than a few percent of the virial radii of their dark matter halos, in order not to overpredict the number of pointlike B-band dropouts. Future deep observations in the J and H bands with NICMOS might reveal several z greater than or similar to 5 objects per field or provide even stronger constraints on the models than existing B, V, and I data.
dc.language.isoen_US
dc.publisherAmerican Astronomical Society
dash.licenseLAA
dc.titleConstraints from the Hubble Deep Field on High‐Redshift Quasar Models
dc.typeJournal Article
dc.description.versionVersion of Record
dc.relation.journalThe Astrophysical Journal
dash.depositing.authorLoeb, Abraham::9975df1f269ab49c1ad5a328a1ec1476::600
dc.date.available2019-09-24T12:04:05Z
dash.workflow.comments1Science Serial ID 95540
dc.identifier.doi10.1086/306969
dash.source.volume514;2
dash.source.page535-543


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