Drake, Catherine; McGregor, Peter; Bicknell, Geoffrey; Dopita, Michael
This is the fourth in our series of papers discussing the nature of radio-excess galaxies, which have radio emission associated with an active nucleus but do not fit into the traditional categories of either radio-loud or radio-quiet active galaxies. In this paper we present optical spectra of our sample of far-infrared (FIR)-luminous radio-excess galaxies. Optical emission-line ratio diagnostics are used to determine the dominant source of the ionizing radiation. We find that radio excess is...[Show more]
Items in Open Research are protected by copyright, with all rights reserved, unless otherwise indicated.