On the evolution of the black-hole/spheroid mass ratio
We present the results of a study which uses the 3CRR sample of radio-loud active galactic nuclei (AGN) to investigate the evolution of the hlack-hole: spheroid relation in the most massive early-type galaxies from 0 < z < 2. Radioloud unification is exploited to obtain virial (line-wi...
| Hauptverfasser: | , , , , |
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| Format: | Journal article |
| Sprache: | English |
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2006
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| _version_ | 1826302268679389184 |
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| author | Mclure, R Jarvis, M Targett, T Dunlop, J Best, P |
| author_facet | Mclure, R Jarvis, M Targett, T Dunlop, J Best, P |
| author_sort | Mclure, R |
| collection | OXFORD |
| description | We present the results of a study which uses the 3CRR sample of radio-loud active galactic nuclei (AGN) to investigate the evolution of the hlack-hole: spheroid relation in the most massive early-type galaxies from 0 < z < 2. Radioloud unification is exploited to obtain virial (line-width) black-hole mass estimates from the 3CRR quasars, and stellar mass estimates from the 3CRR radio galaxies, thereby providing black-hole and stellar mass estimates for a single population of early-type galaxies. At low redshift (z < 1) the 3CRR sample is consistent with a black-hole:spheroid ratio of Mbh/Msph ≃ 0.002, in good agreement with that observed locally for quiescent galaxies of similar stellar mass (Msph ≃ 5 × 10 11M⊙). However, over the redshift interval 0 < z < 2 the 3CRR black-hole:spheroid ratio is found to evolve as M bh/Msph ∝ (1 + z)2-07±0.76, reaching Mbh/Msph ≃ 0.008 by redshift z ≃ 2. This evolution is found to be inconsistent with the local black-hole:spheroid ratio remaining constant at a moderately significant level (98%). If confirmed, the detection of evolution in the 3CRR black-hole:spheroid mass ratio further strengthens the evidence that, at least for massive early-type galaxies, the growth of the central supermassive black hole may be completed before that of the host spheroid. © 2006 WILEY-VCH Verlag GmbH and Co. KGaA. |
| first_indexed | 2024-03-07T05:45:00Z |
| format | Journal article |
| id | oxford-uuid:e6ecffe6-3fb6-4410-b44d-d135552a8771 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T05:45:00Z |
| publishDate | 2006 |
| record_format | dspace |
| spelling | oxford-uuid:e6ecffe6-3fb6-4410-b44d-d135552a87712022-03-27T10:34:34ZOn the evolution of the black-hole/spheroid mass ratioJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:e6ecffe6-3fb6-4410-b44d-d135552a8771EnglishSymplectic Elements at Oxford2006Mclure, RJarvis, MTargett, TDunlop, JBest, PWe present the results of a study which uses the 3CRR sample of radio-loud active galactic nuclei (AGN) to investigate the evolution of the hlack-hole: spheroid relation in the most massive early-type galaxies from 0 < z < 2. Radioloud unification is exploited to obtain virial (line-width) black-hole mass estimates from the 3CRR quasars, and stellar mass estimates from the 3CRR radio galaxies, thereby providing black-hole and stellar mass estimates for a single population of early-type galaxies. At low redshift (z < 1) the 3CRR sample is consistent with a black-hole:spheroid ratio of Mbh/Msph ≃ 0.002, in good agreement with that observed locally for quiescent galaxies of similar stellar mass (Msph ≃ 5 × 10 11M⊙). However, over the redshift interval 0 < z < 2 the 3CRR black-hole:spheroid ratio is found to evolve as M bh/Msph ∝ (1 + z)2-07±0.76, reaching Mbh/Msph ≃ 0.008 by redshift z ≃ 2. This evolution is found to be inconsistent with the local black-hole:spheroid ratio remaining constant at a moderately significant level (98%). If confirmed, the detection of evolution in the 3CRR black-hole:spheroid mass ratio further strengthens the evidence that, at least for massive early-type galaxies, the growth of the central supermassive black hole may be completed before that of the host spheroid. © 2006 WILEY-VCH Verlag GmbH and Co. KGaA. |
| spellingShingle | Mclure, R Jarvis, M Targett, T Dunlop, J Best, P On the evolution of the black-hole/spheroid mass ratio |
| title | On the evolution of the black-hole/spheroid mass ratio |
| title_full | On the evolution of the black-hole/spheroid mass ratio |
| title_fullStr | On the evolution of the black-hole/spheroid mass ratio |
| title_full_unstemmed | On the evolution of the black-hole/spheroid mass ratio |
| title_short | On the evolution of the black-hole/spheroid mass ratio |
| title_sort | on the evolution of the black hole spheroid mass ratio |
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