Mathematics – Probability
Scientific paper
Oct 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983apj...273..505h&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 273, Oct. 15, 1983, p. 505-510. Research supported by the University of Mar
Mathematics
Probability
27
Elliptical Galaxies, Galactic Nuclei, Galactic Structure, Mass To Light Ratios, Radio Galaxies, Correlation, Radio Emission
Scientific paper
Previous work has demonstrated that the probability of an elliptical galaxy exhibiting radio emission is strongly correlated with its optical luminosity. Existing radio and optical data are analyzed to show that at a given optical luminosity radio-loud ellipticals have larger mass-to-light ratios than do radio-quiet ellipticals. The most simple and plausible interpretation of this result is that the ability to produce radio emission correlates more directly with galaxy mass than with galaxy luminosity for ellipticals. The ability of an elliptical galaxy to collimate its ejecta and the efficacy with which this ejecta produces radio emission are probably both enhanced if the elliptical is immersed in a dense gaseous halo. Such a halo is most likely to exist in the deep potential well of a massive elliptical.
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