Optical and UV investigation of the IRAS Seyfert galaxy 1319-164

Optical and UV spectroscopy and optical-imaging observations of the bright IR-selected Seyfert galaxy 1319-164 are presented. It is found that the nucleus is reddened by E(B-v) = 0.3 mag, both in the lines and continuum. The galaxy is large and contains little, if any, spiral structure. There are low-brightness structures at about 5 arcsec from the nucleus, and we find the emission-line region is offset from the continuum by 0.17 arcsec or roughly 50 pc. The UV and optical emission-line profiles show substantial blueward asymmetries, and linewidths are consistent with a type 2 Seyfert galaxy. C IV 1550 A, however, appears to have a broad component which is offset some 600 km/s to the red with respect to the narrowline component. The UV-optical line ratios are similar to other high-ionization Seyfert 2 galaxies, except that the reddening-correlated Ly-alpha/H-beta ratio is less than case B. Nitrogen appears unusually strong in the emission-line spectrum as well. The peculiarities of the system and whether it represents a large new subgroup of AGN are discussed. 26 references