NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-08-18 T02:00:42 PDT
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For refcode 2015ApJ...801...38W:
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2015ApJ...801...38W The Black Hole Mass-Stellar Velocity Dispersion Relation of Narrow-line Seyfert 1 Galaxies Woo, Jong-Hak; Yoon, Yosep; Park, Songyoun; Park, Daeseong; Kim, Sang Chul Abstract. Narrow-line Seyfert 1 galaxies (NLS1s) are arguably one of the key active galactic nucleus (AGN) subclasses in investigating the origin of the black hole mass-stellar velocity dispersion ({{M}_BH_}-{{sigma}_*_}) relation because of their high accretion rate and significantly low {{M}_BH_} . Currently, it is under discussion whether present-day NLS1s offset from the {{M}_BH_}-{{sigma}_*_} relation. Using the directly measured stellar velocity dispersion of 93 NLS1s at z < 0.1, and {{M}_BH_} estimates based on the updated mass estimators, we investigate the {{M}_BH_}-{{sigma}_*_} relation of NLS1s in comparison with broad-line AGNs. We find no strong evidence that the NLS1s deviates from the {{M}_BH_}-{{sigma}_*_} relation, which is defined by reverberation-mapped type 1 AGNs and quiescent galaxies. However, there is a clear trend of the offset with the host galaxy morphology, i.e., galaxies that are more inclined toward the LOS have higher stellar velocity dispersions, suggesting that the rotational broadening plays a role in measuring stellar velocity dispersion based on the single-aperture spectra from the Sloan Digital Sky Survey. In addition, we provide the virial factor log f=0.05+/- 0.12 (f = 1.12), for {{M}_BH_} estimators based on the FWHM of Hbeta, by jointly fitting the {{M}_BH_}-{{sigma}_*_} relation using quiescent galaxies and reverberation-mapped AGNs. Key words: galaxies: active, galaxies: bulges, galaxies: nuclei, galaxies: Seyfert
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