M_BH - sigma relation in SDSS flat-spectrum radio quasars
Abstract
The relationship between the black hole mass and velocity dispersion indicated with [O III] line width is investigated for a sample of 87 flat-spectrum radio quasars (FSRQs) selected from SDSS DR3 quasar catalogue. We found the M_bh - sigma_[O III] relation is deviated from Tremaine et al. relation for nearby inactive galaxies, with a larger black hole mass at given velocity dispersion. There is no strong evidence of cosmology evolution in M_bh - sigma_[O III] relation up to z~0.8. A significant correlation between the [O III] luminosity and Broad Line Region (BLR) luminosity is found. When transferring the [O III] luminosity to Narrow Line Region (NLR) luminosity, the BLR luminosity is, on average, larger than NLR one by about one order of magnitude. We found a strong correlation between the synchrotron peak luminosity and NLR luminosity, which implies a tight relation between the jet physics and accretion process.
Cite
@article{arxiv.0905.2525,
title = {M_BH - sigma relation in SDSS flat-spectrum radio quasars},
author = {Minfeng Gu and Zhaoyu Chen and Xinwu Cao},
journal= {arXiv preprint arXiv:0905.2525},
year = {2015}
}
Comments
6 pages, 4 figures, accepted to MNRAS