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For refcode 1994A&AS..108...61F:
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Copyright by European Southern Observatory (ESO). Reproduced by permission
1994A&AS..108...61F Warm IRAS sources from the point source catalog. IV. Extended optical line emission G.C. Fehmers, M.H.K. de Grijp, G.K. Miley and W.C. Keel Sterrewacht Leiden, Postbus 9513, NL-2300 RA Leiden, The Netherlands Department of Physics and Astronomy, University of Alabama, Box 870324, Tuscaloosa, AL 35487-0324, U.S.A. Received April 14; accepted April 25,1994 Abstract. - We present a list of objects observed to have extended line emission in our spectroscopic survey of infrared-warm AGN. Slit spectroscopic data were obtained for 225 galaxies identified with objects in our compendium of warm sources from the IRAS Point Source Catalog. Of these, 44 have spatially-resolved emission-line regions along the (arbitrarily placed) slit direction. Measured (projected) linear sizes of the ionized gas regions extend to > 10 kpc. In the case of the IRAS Seyfert galaxies the spatially extended line emission appears to have a lower ionization state than the nuclear emission. This contrasts with the warm IRAS starburst galaxies for which there is no significant difference between the ionization states of the nuclear and extended emission. For the starburst galaxies, there is a relation between the extent of star formation as seen at H{alpha} and the far-IR colors, with more compact bursts having "warmer" colors. Key words: galaxies: active - galaxies: Seyfert - infrared: galaxies - galaxies: ISM
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