Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980ap%26ss..70..211g&link_type=abstract
Astrophysics and Space Science, vol. 70, no. 1, June 1980, p. 211-232.
Astronomy and Astrophysics
Astronomy
15
Axes Of Rotation, Elliptical Galaxies, Galactic Structure, Radio Galaxies, Extraterrestrial Radiation, Position (Location), Schmidt Cameras, Sky Surveys (Astronomy), Tables (Data)
Scientific paper
The elliptical galaxies identified with 139 radio sources having double, wide-tail, twin-tail, or head-tail structures were examined on glass or film copies of Schmidt sky survey plates, and orientations were measured for 78 of them. The observed radio axes of well-collimated double sources are distributed over all possible orientations relative to their parent galaxies, but there is a significant preference for orientations within 30 deg of the projected minor axes of the galaxies. A similar minor-axis trend is found among wide-tail and twin-tail sources. The observed minor-axis peak is fairly broad. These results are consistent with either a very large dispersion in the ejection of radio components about the minor axes of oblate galaxies or a small dispersion about the equatorial planes of prolate galaxies. Other evidence indicates that both oblate and prolate radio galaxies exist.
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