WARM IRAS SOURCES FROM THE POINT-SOURCE CATALOG .4. EXTENDED OPTICAL-LINE EMISSION

We present a list of objects observed to have extended line emission i n our spectroscopic survey of infrared-warm AGN. Slit spectroscopic da ta were obtained for 225 galaxies identified with objects in our compe ndium 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 ioniz ed gas regions extend to > 10 kpc. In the case of the IRAS Seyfert gal axies the spatially extended line emission appears to have a lower ion ization state than the nuclear emission. This contrasts with the warm IRAS starbust galaxies for which there is no significant difference be tween 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 Her and the far-IR colors, with more compact bur sts having ''warmer'' colors.