Contents of: VI/111/./abstract/MGREENHO_AGN.abs

The following document lists the file abstract/MGREENHO_AGN.abs from catalogue VI/111.
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 This program constitutes a new and fundamental exploration of
 active galactic nuclei (AGN) that will yield new understanding of
 the AGN phenomena, new observational tools to reveal obscured AGN,
 and new broad constraints on efforts to model their continuum
 radiation fields. The goals of this program are to: [a] obtain
 heavy element abundances in the innermost regions of AGN, [b]
 determine a dynamical zone for AGN coronal line regions (CLR)
 relative to Seyfert broad (BLR) and narrow line regions (NLR),
 [c] measure the kinetic temperature and density of AGN CLR, [d]
 obtain constraints on AGN photoionization models that are free of
 abundance and gas phase depletion assumptions, and [e] obtain a
 data set that can reveal correlations between these data ([a]
 through [d]) and nuclear classification.

 This program will increase the scientific mission return of the
 Central Program proposal HSMITH_AGN beyond its original design by
 combining GT data with these OT data to achieve new additional
 goals. Our analysis focuses on bright coronal and other forbidden
 lines. The primary line list (Table 1) emphasizes transitions from
 a maximal set of ionization states of a small group of elements.
 Our approach is to observe multiple transitions within a given ion
 and among several ions of the same element to constrain CLR kinetic
 temperature and density via infrared lines and independent of
 assumed abundance ratios. Similarly, observing a wide range of
 ionization states of a single element, will constrain
 photoionization models independent of assumed gas phase depletion
 factors, and velocity resolved grating spectra will reveal coronal
 line profile shapes relative to other BLR and NLR lines. Finally,
 our target list (Table 2) is designed to test the hypothesis that
 coronal lines can reveal obscured AGN.