A radio continuum study of four spiral galaxies with an unusual radio morphology

Details A radio continuum study of four spiral galaxies with an unusual radio morphology A radio continuum study of four spiral galaxies with an unusual radio morphology

Jun 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977a%26a....58..221d&link_type=abstract

Astronomy and Astrophysics, vol. 58, no. 1-2, June 1977, p. 221-236.

Astronomy and Astrophysics

Astronomy

86

Centimeter Waves, Galactic Nuclei, Galactic Structure, Microwave Emission, Radio Astronomy, Spiral Galaxies, Elliptical Galaxies, Magnetic Flux, Polarization (Waves), Radiant Flux Density, Radio Spectra, Radio Telescopes

Scientific paper

Results are presented for high-resolution radio continuum observations at frequencies of 610, 1410, and 4995 MHz of four spiral galaxies with large anomalous radio structures of high surface brightness. The triple radio structure previously detected near the center of NGC 4631 is resolved into at least five components, none of which can be clearly identified with the galactic nucleus. It is found that the 610-MHz emission from the anomalous radio arms of NGC 4258 terminates abruptly about 4 arcmin east and west of the nucleus, that the dominant radio structure in NGC 2146 is an unresolved ridge of emission at position angle 126 deg responsible for 80% to 85% of the flux density, and that NGC 3079 contains a bright central radio source as well as east and west extensions from this source, intense symmetric unresolved ridges along the major axis, and an emission spur in the NW region where the optical emission is brightest. Radio spectra, linear polarizations, and total radio-energy contents are determined for each of these radio features.

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