Physics
Scientific paper
Dec 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006chjaa...6..655l&link_type=abstract
Chinese Journal of Astronomy & Astrophysics, Vol. 6, p. 655-662
Physics
2
Black Hole Physics, Galaxies: Active, Galaxies: Nuclei, Quasars: General
Scientific paper
In an examination of the relationship between the black hole mass MBH and stellar velocity dispersion σ* in radio-loud active galactic nuclei (AGNs), we studied two effects which may cause uncertainties in the black hole mass estimates of radio-loud AGNs: the relativistic beaming effect on the observed optical continuum radiation and the orientation effect on the broad emission line width. After correcting these two effects, we re-examined the MBH--- σ[OIII] relation for a sample of radio-loud and radio-quiet AGNs, and found the relation for radio-loud AGNs still deviated from that for nearby normal galaxies and radio-quiet AGNs. We also found there is no significant correlation between radio jet power and narrow [OIII] line width, indicating absence of strong interaction between radio jet and narrow line region. It may be that the deviation of the MBH-- σ* relation of radio-loud AGNs is intrinsic, or that the [OIII] line width is not a good indicator of σ* for radio-loud AGNs.
Jiang Dong Rong
Liu Yi
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