"Velocity Dispersion and Black Hole Mass in Seyfert 1 Galaxies"
Nelson, Charles H.
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Bulge stellar velocity dispersions, sigma, in Seyfert 1 galaxies are combined with the M_bh -- sigma relation to validate reverberation mapping as a means of determining nuclear black hole masses. Seyfert galaxies follow the same relation as non-active galaxies, indicating that reverberation mapping is consistent with other methods. A similar result is obtained using new high resolution profiles of the [OIII] 5007 line for PG Quasars. Reconsidering the M_bulge - M_bh relation, we attempt to explain differences between Seyfert and non-active galaxies. We suggest that Seyfert bulges are systematically brighter than non-active galaxies, having lower M/L and younger stellar populations.
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Bennett, Wendy; Madland, Mark; Weinzirl, Timothy; Nelson, Charles H. (2007-06-01)Recent searches for massive black holes in galactic nuclei show that they are common if not ubiquitous. Furthermore, there are important relationships between black hole mass and properties characterizing the size and ...
Weinzirl, Timothy; Bennett, Wendy; Madland, Mark (2007-05-29)Seyfert galaxies, in which accretion onto a massive nuclear black hole acts as a powerful energy source, allegedly have bulges more luminous per unit mass than those in normal galaxies. We have tested this claim through ...
Bennett, Wendy; Weinzirl, Timothy; Nelson, Charles H. (2005-06-23)Previous investigations have indicated that the bulges of Seyfert galaxies are more luminous than those in normal galaxies of the same mass. This may result if Seyfert bulges have experienced recent star formation, perhaps ...