Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003chjaa...3..119b&link_type=abstract
Chinese Journal of Astronomy & Astrophysics, Vol. 3, p. 119-124
Astronomy and Astrophysics
Astrophysics
3
Galaxies: Active, Galaxies: Nuclei, Galaxies: Bulges, Quasars, Galaxies: Seyfert
Scientific paper
We present estimated ratios of the central black hole mass to the bulge mass (Mbh/Mbulge) for 15 Narrow Line Seyfert 1 galaxies (NLS1s). It is found that NLS1s apparently have lower mass ratios: the average mass ratio is about 1× 10-4 with a spread of 2, which is one order of magnitude lower than for Broad Line AGNs and quiescent galaxies. This lower value, as compared to that established essentially for all other types of galaxies, can be accounted for by an underestimation of the black hole masses and an overestimation of the bulge masses in the NLS1s.
Bian Wei-Hao
Zhao Yong-Heng
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