Computer Science
Scientific paper
Jul 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992hst..prop.3982b&link_type=abstract
HST Proposal ID #3982
Computer Science
Hst Proposal Id #3982
Scientific paper
We will make a comprehensive study of the emission-line gas in the narrow-lined region (NLR) of active galactic nuclei (AGN). We will concentrate on Seyfert 2 galaxies in order to avoid possible confusion with the spectrum of the broad line region (BLR). We wish to use a wide variety of the HST instruments, to insure that a comprehensive and high-quality data set is built up for a representative sample of nearby Seyfert 2 galaxies. These data should immediately allow us to address several important, inter-related questions about AGN: a. What is the velocity field in the innermost part of the NLR? b. Where does the reddening occur in AGN? c. What is the chemical composition of the gas associated with the AGN? d. How do the Seyfert 1 and Seyfert 2 continuum sources differ? e. Do most Seyfert 2 galaxies contain "hidden" BLRs? We will exploit both the high UV response and high spatial resolution of HST, using PC images to map out the NLR structure in a few strong lines, FOS and HRS to obtain detailed nuclear spectra over a wide wavelength range, and most importantly, FOC in its long slit mode to study spatial variations in the UV and optical spectra.
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