The ultraviolet to infrared continuum of ten narrow emission line active galaxies.

Abstract

The overall continuum spectra of 10 narrow line active galaxies are presented based on IR ground-based and IRAS photometry, long slit optical spectrophotometry and UV spectroscopy obtained with the IUE. Nonstellar components found include a nonthermal power law continuum in the optical, a thermal UV component from an accretion disk, Balmer continuum emission, and three dust components with typical temperatures of 40, 150, and 1000 K. The presence of a broad component in H-alpha, and power law overall continua, suggest that NGC 5506 and Tol 0109-380 are probably obscured Seyfert type I objects. Sufficient ionizing photons are produced by the UV excess to account for the observed line emission.