NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-06-18 T13:49:27 PDT
Help | Comment | NED Home

For refcode 2015ApJ...802...98M:
Retrieve 14 NED objects in this reference.
Please click here for ADS abstract

NED Abstract

Copyright by American Astronomical Society. Reproduced by permission
2015ApJ...802...98M A New Black Hole Mass Estimate for Obscured Active Galactic Nuclei Minezaki, Takeo; Matsushita, Kyoko Abstract. We propose a new method for estimating the mass of a supermassive black hole, applicable to obscured active galactic nuclei (AGNs). This method estimates the black hole mass using the width of the narrow core of the neutral FeKalpha emission line in X-rays and the distance of its emitting region from the black hole based on the isotropic luminosity indicator via the luminosity scaling relation. Assuming the virial relation between the locations and the velocity widths of the neutral FeKalpha line core and the broad Hbeta emission line, the luminosity scaling relation of the neutral FeKalpha line core emitting region is estimated. We find that the velocity width of the neutral FeKalpha line core falls between that of the broad Balmer emission lines and the corresponding value at the dust reverberation radius for most of the target AGNs. The black hole mass {{M}_BH,FeKalpha_} estimated with this method is then compared with other black hole mass estimates, such as the broad emission-line reverberation mass {{M}_BH,rev_} for type 1 AGNs, the mass {{M}_BH,{{H_2_}O}} based on the H_2_O maser, and the single-epoch mass estimate {{M}_BH,pol_} based on the polarized broad Balmer lines for type 2 AGNs. We find that {{M}_BH,FeKalpha_} is consistent with {{M}_BH,rev_} and {{M}_BH,pol_}, and find that {{M}_BH,FeKalpha_} correlates well with {{M}_BH,{{H_2_}O}}. These results suggest that {{M}_BH,FeKalpha_} is a potential indicator of the black hole mass for obscured AGNs. In contrast, {{M}_BH,FeKalpha_} is systematically larger than {{M}_BH,{{H_2_}O}} by about a factor of 5, and the possible origins are discussed. Key words: black hole physics, galaxies: active, galaxies: nuclei, galaxies: Seyfert, polarization, X-rays: galaxies
Retrieve 14 NED objects in this reference.
Please click here for ADS abstract

Back to NED Home