Mathematics – Logic
Scientific paper
May 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983apj...268..628h&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 268, May 15, 1983, p. 628-631. Research supported by the University of Mary
Mathematics
Logic
24
Galactic Clusters, Galactic Radio Waves, Galactic Structure, Radio Galaxies, Spiral Galaxies, Centimeter Waves, Continuous Spectra, Galactic Nuclei, Luminosity, Peculiar Galaxies
Scientific paper
The list of examples selected by Toomre (1977) is supplemented with morphologically similar systems from the Arp Atlas of Peculiar Galaxies (1966). This sample of mergers is compared with two samples of spiral galaxies in terms of radio power. The first comparison sample comprises galaxies with the same optical luminosities as the mergers. The second is that subset of the first sample in which the galaxy forms part of a double or multiple system. The mergers are found to be approximately eight times more likely to be radio-loud (radio power greater than or equal to 10 to the 22nd W/Hz at 1.4 GHz) than the members of the first sample and two to three times more likely to be radio-loud than those of the second sample. The merger either involves a unique mechanism for stimulating radio emission or makes more extensive use of the same mechanism that enhances radio emission in galaxies in double or multiple systems.
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