The ultraviolet spectrum of the active elliptical galaxy NGC 1052.
Boksenberg, A.; Penston, M. V.; Snijders, M. A. J.; Fosbury, R. A. E.
Switzerland, United Kingdom, Spain
Abstract
Low resolution IUE observations of NGC 1052 in both the long and the short wavelength regions are reported along with optical multi-aperture photometry. It is found that the ultraviolet energy distribution of NGC 1052 is similar to that of other normal galaxies observed with IUE, having a large excess at short wavelengths above the extrapolation of the late-type star component which dominates the optical continuum. This implies important modifications of the previously accepted U- and B-band K-corrections for radio and normal galaxies at redshifts around 0.4 and 0.6, respectively. These observations support the hypothesis that the ionization observed near the nucleus of NGC 1052 is the result of shock rather than photoionization process.