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Ionization Mechanisms in JetDominated Seyferts A Detailed Case Study
The Interplay among Black Holes, Stars and ISM
in Galactic Nuclei
c
Proceedings IAU Symposium No. 222, 2004 2004 International Astronomical Union
Th. Storchi Bergmann, L.C. Ho H.R. Schmitt, eds. DOI: 00.0000/X000000000000000X
Ionization Mechanisms in Jet-Dominated
Seyferts: A Detailed Case Study
1 1 1 2
D.J. Rosario , M. Whittle , J.D. Silverman , A.S. Wilson and C.H.
4 3
0 Nelson
0 1Astronomy Department, University of Virginia, Charlottesville, VA 22903
2 2Astronomy Department, University of Maryland, College Park, MD 20742
r 3Physics and Astronomy, Drake University, Des Moines, IA 50311-4505
p
A Abstract. For the past 10 years there has been an active debate over whether fast shocks play an
important role in ionizing emission line regions in Seyfert galaxies. To investigate this claim, we
1
2 have studied the Seyfert 2 galaxy Mkn 78, using HST UV/optical images and spectroscopy. Since
Mkn 78 provides the archetypal jet-driven bipolar velocity field, if shocks are important anywhere
1 they should be important in this object. Having mapped the emission line fluxes and velocity
v field, we first compare the ionization conditions to standard photoionization and shock models.
9 We find coherent variations of ionization consistent
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