Radio continuum observations of the bar and disk of M83

Details Radio continuum observations of the bar and disk of M83 Radio continuum observations of the bar and disk of M83

Aug 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985aj.....90.1474o&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 90, Aug. 1985, p. 1474-1480.

Astronomy and Astrophysics

Astronomy

58

Barred Galaxies, Continuous Spectra, Galactic Structure, Interstellar Matter, Radio Emission, Radio Galaxies, Astronomical Maps, H Ii Regions, Nonthermal Radiation, Polarization Characteristics, Radiant Flux Density, Radio Spectra, Shock Waves

Scientific paper

The barred spiral galaxy M83 has been observed at 1465 and 4885 MHz with the VLA. The author finds significant emission in the bar, which is coincident with the narrow, linear, offset dust lanes visible there. This emission is nonthermal and moderately polarized. The author also finds spiral-arm structure, composed of H II regions and extended nonthermal features associated with observed dust lanes. These observations are consistent with the interpretation that the bar and nonthermal spiral-arm emission are due to shock enhancement of the underlying disk emission.

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