"Faber-Jackson relation in Seyfert galaxies"
Nelson, Charles H.
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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 associated with the fueling of the nuclear black hole. To confirm this, we have analyzed Hubble Space Telescope images of a large number of Seyfert 2 galaxies with published velocity dispersions. The IRAF task ELLIPSE was used to generate luminosity profiles from galaxy isophotes. Assuming either an R1/4 law or an exponential for the bulge portions of the profiles we then calculated bulge magnitudes for the sample. Combining our results with the velocity dispersions we construct the Faber-Jackson relation, a well-known correlation between luminosity and velocity dispersion. By comparing with the Faber-Jackson relation for normal galaxies we test the proposition that Seyfert bulges tend to be more luminous.
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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 ...
Nelson, Charles H.; Green, Richard; Bower, Gary; Gebhardt, Karl; Weistrop, Donna (2003)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 ...