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The spectral decomposition of Active Galactic Nuclei with double-peaked Balmer lines from SDSS

Published online by Cambridge University Press:  01 July 2007

W. Bian
W. Bian*
Affiliation:
Department of Physics and Institute of Theoretical Physics, Nanjing Normal University, Nanjing 210097, China
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Abstract

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For a sample of 52 double-peaked broad-lines AGNs from the Sloan Digital Sky Survey (SDSS), we do the spectral decomposition to obtain the host spectrum and the nuclei spectrum from their SDSS spectra, as well as the bulge luminosity (Lbulge), stellar velocity dispersion (σ*). A strong correlation is found between the σ* and the gaseous velocity dispersion in narrow line regions. With the Mbh − σ* relation, we estimate the black hole masses, range from 1.0 × 107 to 6 × 108 M⊙, and the Eddington ratio from about 0.01 to about 1. It is consistent with the result from Mbh − Lbulge relation. However, it is not consistent with the mass from the Hβ FWHM. It seems that the empirical size-luminosity relation for broad line regions dose not hold for double-peaked AGNs, otherwise the calibration factor is as small as 0.185, suggesting the non-virial dynamics of broad line regions.

Keywords

galaxies: bulges — galaxies: active — galaxies: nuclei — black hole physics
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 3 , Symposium S245: Formation and Evolution of Galaxy Bulges , July 2007 , pp. 237 - 238
Copyright
Copyright © International Astronomical Union 2008

References

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