An Ionization-Dependent Baldwin Effect?

Details An Ionization-Dependent Baldwin Effect? An Ionization-Dependent Baldwin Effect?

Dec 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993aas...18310606e&link_type=abstract

American Astronomical Society, 183rd AAS Meeting, #106.06; Bulletin of the American Astronomical Society, Vol. 25, p.1448

Astronomy and Astrophysics

Astronomy

7

Scientific paper

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 Angstroms. 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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