An Ionization-Dependent Baldwin Effect?

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Session 106 -- AGN
Display presentation, Saturday, January 15, 9:30-6:45, Salons I/II Room (Crystal Gateway)

[106.06] An Ionization-Dependent Baldwin Effect?

B. R. Espey (University of Pittsburgh), K. M. Lanzetta (State University of New York), D. A. Turnshek (University of Pittsburgh)

We will present results concerning the Baldwin Effect in AGN. The data used come from an optimally extracted set of IUE spectra (Lanzetta, Turnshek and Sandoval 1993, ApJS, 84, 109) and published ground-based data. The improvement in the signal-to-noise of the optimally extracted IUE data relative to previously available results enables us to study lines as far shortward in the spectrum as OVI 1034\AA. Our data support the results of previous studies of the Baldwin Effect and, in addition, suggest that the strength of the effect is related to the ionization potential of the relevant ion. The OVI line shows the strongest Baldwin Effect of any previously examined emission line and the Balmer lines the weakest. The consequences of this result for AGN models are examined.

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