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Do Quiescent and Active Galaxies Have Different M_(BH)-σ* Relations?

Woo, Jong-Hak and Schulze, Andreas and Park, Daeseong and Kang, Wol-Rang and Kim, Sang Chul and Riechers, Dominik A. (2013) Do Quiescent and Active Galaxies Have Different M_(BH)-σ* Relations? Astrophysical Journal, 772 (1). Art. No. 49. ISSN 0004-637X. doi:10.1088/0004-637X/772/1/49.

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To investigate the validity of the assumption that quiescent galaxies and active galaxies follow the same black hole mass (M_BH)-stellar velocity dispersion (σ*) relation, as required for the calibration of M_BH estimators for broad line active galactic nuclei (AGNs), we determine and compare the M_BH-σ* relations, respectively, for quiescent and active galaxies. For the quiescent galaxy sample, composed of 72 dynamical M_BH measurements, we update σ* for 28 galaxies using homogeneous H-band measurements that are corrected for galaxy rotation. For active galaxies, we collect 25 reverberation-mapped AGNs and improve σ* measurement for two objects. Combining the two samples, we determine the virial factor f, first by scaling the active galaxy sample to the M_BH-σ* relation of quiescent galaxies, and second by simultaneously fitting the quiescent and active galaxy samples, as f=5.1^(+1.5)_(-1.1) and f=5.9^(+2.1)_(-1.5), respectively. The M_BH-σ* relation of active galaxies appears to be shallower than that of quiescent galaxies. However, the discrepancy is caused by a difference in the accessible M_BH distribution at given σ*, primarily due to the difficulty of measuring reliable stellar velocity dispersion for the host galaxies of luminous AGNs. Accounting for the selection effects, we find that active and quiescent galaxies are consistent with following intrinsically the same M_BH-σ* relation.

Item Type:Article
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Riechers, Dominik A.0000-0001-9585-1462
Additional Information:© 2013 American Astronomical Society. Received 2013 March 24; accepted 2013 May 14; published 2013 July 5. We thank the anonymous referee for constructive suggestions. This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MEST) (No. 2012-006087). J.H.W acknowledges the support by the Korea Astronomy and Space Science Institute (KASI) grant funded by the Korea government (MEST).
Funding AgencyGrant Number
National Research Foundation of Korea2012-006087
Korea Astronomy and Space Science Institute (KASI)UNSPECIFIED
Ministry of Education, Science and Technology (Korea)UNSPECIFIED
Subject Keywords:galaxies: bulges; galaxies: kinematics and dynamics; infrared: galaxies; techniques: spectroscopic
Issue or Number:1
Record Number:CaltechAUTHORS:20130815-101046591
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Official Citation:Do Quiescent and Active Galaxies Have Different M BH-σ* Relations? Jong-Hak Woo et al. 2013 ApJ 772 49
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:39945
Deposited On:16 Aug 2013 20:15
Last Modified:09 Nov 2021 23:48

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