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Galaxy cores as relics of black hole mergers

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dc.contributor.author Merritt, David en_US
dc.contributor.author Milosavljevic, Milos en_US
dc.contributor.author Rest, Armin en_US
dc.contributor.author van den Bosch, Frank en_US
dc.date.accessioned 2006-03-30T19:29:56Z en_US
dc.date.available 2006-03-30T19:29:56Z en_US
dc.date.issued 2002-04 en_US
dc.identifier.citation Mon.Not.Roy.Astron.Soc. 331 (2002) L51 en_US
dc.identifier.issn 0035-8711 en_US
dc.identifier.uri http://hdl.handle.net/1850/1489 en_US
dc.description RIT community members may access full-text via RIT Libraries licensed databases: http://library.rit.edu/databases/
dc.description.abstract We investigate the hypothesis that the cores of elliptical galaxies and bulges are created from the binding energy liberated by the coalescence of supermassive binary black holes during galaxy mergers. Assuming that the central density profiles of galaxies were initially steep power laws, p ~ r^ −2, we define the “mass deficit” as the mass in stars that had to be removed from the nucleus in order to produce the observed core. We use nonparametric deprojection to compute the mass deficit in a sample of 35 early-type galaxies with high-resolution imaging data. We find that the mass deficit correlates well with the mass of the nuclear black hole, consistent with the predictions of merger models. We argue that cores in halos of non-interacting dark matter particles should be comparable in size to those observed in the stars (Refer to PDF file for exact formulas). en_US
dc.description.sponsorship This work was supported by NSF grant AST 00-71099 and NASA grants NAG5-6037 and NAG5-9046 to DM. en_US
dc.format.extent 172887 bytes en_US
dc.format.mimetype application/pdf en_US
dc.language.iso en_US en_US
dc.publisher Blackwell Pubilshing en_US
dc.relation.ispartofseries vol. 331 en_US
dc.relation.ispartofseries issue 4 en_US
dc.subject Binary black holes en_US
dc.subject cD galaxies en_US
dc.subject Galaxies-elliptical and lenticular en_US
dc.subject Galaxies-nuclei en_US
dc.title Galaxy cores as relics of black hole mergers en_US
dc.type Article en_US
dc.identifier.url http://dx.doi.org/10.1046/j.1365-8711.2002.05436.x

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