Accession Number : AD0679650

Title :   RADIO SOURCES AND ELLIPTICAL GALAXIES.

Corporate Author : CALIFORNIA INST OF TECH PASADENA OWENS VALLEY RADIO OBSERVATORY

Personal Author(s) : Rogstad,David H. ; Ekers,Ronald D.

Report Date : 1968

Pagination or Media Count : 33

Abstract : One hundred ninety-one E and SO non-cluster galaxies with known redshift have been surveyed for radio emission at a frequency of 2640 MHz. The observations support the hypothesis that an elliptical galaxy must have an absolute photographic magnitude brighter than -20 to be a strong radio source. A comparison of the results of this survey with observations of radio galaxies in rich clusters indicates that cluster membership does not enhance the probability of an elliptical galaxy being a radio emitter. In addition to the strong radio sources, several E and SO galaxies were found to have weaker radio emission associated with them, but their absolute radio luminosity was still on the order of 100 times larger than that for detected spiral galaxies. (Author)

Descriptors :   (*GALAXIES, *EXTRATERRESTRIAL RADIO WAVES), PHOTOGRAPHIC ANALYSIS, ASTRONOMY, BRIGHTNESS, PROBABILITY, TABLES(DATA)

Subject Categories : Astrophysics

Distribution Statement : APPROVED FOR PUBLIC RELEASE