The Low-Mass End of the MBH/Mhost Relation in Quasars
The MBH-Mhost relation in quasars has been probed only in a limited parameter space, namely, at MBH∼109 M⊙ and Mhost∼1012 M⊙. Here we present a study of 26 quasars laying in the low-mass end of the relation, down to MBH∼107 M⊙. We selected quasars from the SDSS and HST-FOS archives, requiring modes...
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Wiley
2012-01-01
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| Series: | Advances in Astronomy |
| Online Access: | http://dx.doi.org/10.1155/2012/782528 |
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| author | Roberto Decarli Renato Falomo Jari K. Kotilainen Tomi Hyvönen Michela Uslenghi Aldo Treves |
| author_facet | Roberto Decarli Renato Falomo Jari K. Kotilainen Tomi Hyvönen Michela Uslenghi Aldo Treves |
| author_sort | Roberto Decarli |
| collection | DOAJ |
| description | The MBH-Mhost relation in quasars has been probed only in a limited parameter space, namely, at
MBH∼109 M⊙ and Mhost∼1012 M⊙. Here we present a study of 26 quasars laying in the low-mass
end of the relation, down to MBH∼107 M⊙. We selected quasars from the SDSS and HST-FOS
archives, requiring modest MBH (as derived through the virial paradigm). We imaged our sources in H band from the Nordic Optical Telescope. The quasar host galaxies have been resolved in 25 out
of 26 observed targets. Host galaxy luminosities and stellar masses are computed, under reasonable
assumptions on their star formation histories. Combining these results with those from our previous
studies, we manage to extend the sampled parameter space of the MBH-Mhost relation in quasars.
The relation holds over 2 dex in both the parameters. For the first time, we are able to measure the slope of the MBH-Mhost relation in quasars. We find that it is consistent with the linear case (similarly to what observed in
quiescent galaxies). We do not find any evidence of a population of massive black holes lying below
the relation. |
| format | Article |
| id | doaj-art-67ed9b14a72a4aa6bfc13babffc2fd88 |
| institution | Kabale University |
| issn | 1687-7969 1687-7977 |
| language | English |
| publishDate | 2012-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Astronomy |
| spelling | doaj-art-67ed9b14a72a4aa6bfc13babffc2fd882025-02-03T01:33:19ZengWileyAdvances in Astronomy1687-79691687-79772012-01-01201210.1155/2012/782528782528The Low-Mass End of the MBH/Mhost Relation in QuasarsRoberto Decarli0Renato Falomo1Jari K. Kotilainen2Tomi Hyvönen3Michela Uslenghi4Aldo Treves5Galaxy and Cosmology Department, Max-Planck-Institut für Astronomie, Königstuhl 17, 69117 Heidelberg, GermanyOsservatorio Astronomico di Padova, INAF, Vicolo dell’ Osservatorio 5, 35122 Padova, ItalyFinnish Centre for Astronomy with ESO (FINCA), University of Turku, Väisäläntie 20, 21500 Piikkiö, FinlandFinnish Centre for Astronomy with ESO (FINCA), University of Turku, Väisäläntie 20, 21500 Piikkiö, FinlandINAF-IASF Milano, Via E. Bassini 15, 20133 Milano, ItalyINAF-IASF Milano, Via E. Bassini 15, 20133 Milano, ItalyThe MBH-Mhost relation in quasars has been probed only in a limited parameter space, namely, at MBH∼109 M⊙ and Mhost∼1012 M⊙. Here we present a study of 26 quasars laying in the low-mass end of the relation, down to MBH∼107 M⊙. We selected quasars from the SDSS and HST-FOS archives, requiring modest MBH (as derived through the virial paradigm). We imaged our sources in H band from the Nordic Optical Telescope. The quasar host galaxies have been resolved in 25 out of 26 observed targets. Host galaxy luminosities and stellar masses are computed, under reasonable assumptions on their star formation histories. Combining these results with those from our previous studies, we manage to extend the sampled parameter space of the MBH-Mhost relation in quasars. The relation holds over 2 dex in both the parameters. For the first time, we are able to measure the slope of the MBH-Mhost relation in quasars. We find that it is consistent with the linear case (similarly to what observed in quiescent galaxies). We do not find any evidence of a population of massive black holes lying below the relation.http://dx.doi.org/10.1155/2012/782528 |
| spellingShingle | Roberto Decarli Renato Falomo Jari K. Kotilainen Tomi Hyvönen Michela Uslenghi Aldo Treves The Low-Mass End of the MBH/Mhost Relation in Quasars Advances in Astronomy |
| title | The Low-Mass End of the MBH/Mhost Relation in Quasars |
| title_full | The Low-Mass End of the MBH/Mhost Relation in Quasars |
| title_fullStr | The Low-Mass End of the MBH/Mhost Relation in Quasars |
| title_full_unstemmed | The Low-Mass End of the MBH/Mhost Relation in Quasars |
| title_short | The Low-Mass End of the MBH/Mhost Relation in Quasars |
| title_sort | low mass end of the mbh mhost relation in quasars |
| url | http://dx.doi.org/10.1155/2012/782528 |
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