"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.
Wendy Bennett and Tim Weinzirl are both students at Drake University. Charles Nelson is Assistant Professor of Astronomy in the Department of Physics and Astronomy. He can be contacted at email@example.com