Search for Radio Emission from Haro's Blue Galaxies at 9.26 cm

Abstract

HARO reported several galaxies with nuclei that are abnormally bright in the blue region of the spectrum¹. He compiled a list of forty-four galaxies, selecting blue objects from plates, each of which had been exposed through violet, yellow and blue filters. Later, Münch² examined many of the objects on the list and found them to differ rather widely in both structure and luminosity. Some are reported to have an internal structure suggesting spiral arms. The arms, however, appeared shorter and thicker than those in ordinary spirals. Kiang³, after examining enlargements of the Palomar Sky Survey prints, reported that many more than one-third of Haro's galaxies show a jet or jets or a system of filaments. Kiang has suggested that this structure is similar to that in the giant elliptical galaxy M87 (Virgo A) or the quasi-stellar source 3C 273, both radio objects of much interest. In view of these similarities, it was decided to search for radio emission from the forty-four galaxies in Haro's list.