NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-08-20 T22:30:54 PDT
Help | Comment | NED Home

For refcode 2001ApJ...561L..59W:
Retrieve 11 NED objects in this reference.
Please click here for ADS abstract

NED Abstract

Copyright by American Astronomical Society. Reproduced by permission
2001ApJ...561L..59W Inclinations and Black Hole Masses of Seyfert 1 Galaxies Xue-Bing Wu and J. L. Han Received 2001 July 6; accepted 2001 September 17; published 2001 October 8 ABSTRACT A tight correlation between black hole mass (M_BH_) and central velocity dispersion ({sigma}) has been found recently for both active and quiescent galaxies. By applying this correlation, we develop a simple method to derive the inclination angles for a sample of 11 Seyfert 1 galaxies that have both measured central velocity dispersions and black hole masses estimated by reverberation mapping. These angles, with a mean value of 36^deg^ that agrees well with the result obtained by fitting the iron K{alpha} lines of Seyfert 1 galaxies observed with ASCA, provide further support to the orientation-dependent unification scheme of active galactic nuclei (AGNs). A positive correlation of the inclinations with observed FWHMs of the H{beta} line and a possible anticorrelation with the nuclear radio loudness have been found. We conclude that more accurate knowledge of inclinations and broad-line region dynamics is needed to improve the black hole mass determination of AGNs with the reverberation mapping technique. Subject headings: black hole physics - galaxies: active - galaxies: nuclei - galaxies: Seyfert
Retrieve 11 NED objects in this reference.
Please click here for ADS abstract

Back to NED Home