VLA radio continuum observations of the edge-on spiral galaxy NGC 3079.
Abstract
Radio continuum VLA maps of the edge-on spiral galaxy NGC 3079 are presented at 1.4 and 4.9 GHz. Extensions of emission along the minor axis are resolved at 4.9 GHz into lobes and bridges. The eastern component consists of a highly polarized ring-shaped lobe connected by a thin bridge to the central region of the galaxy and has an integrated flux density of 70 mJy at 1.4 GHz. The western component has an incomplete lobe, also connected to the center of the galaxy by a thin bridge, and has a flux density of 90 mJy at 1.4 GHz. At 4.9 GHz, a nuclear point source (size less than 100 pc at a distance of 24 Mpc) has a flux density of 87 mJy. Various possibilities are discussed to explain the origin of these structures. It is suggested that either Parker instabilities or jetlike phenomena may be producing them.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- October 1983
- DOI:
- 10.1086/184120
- Bibcode:
- 1983ApJ...273L..11D
- Keywords:
-
- Galactic Structure;
- Radio Galaxies;
- Spiral Galaxies;
- Astronomical Maps;
- Continuous Spectra;
- Galactic Nuclei;
- Radiant Flux Density;
- Astronomy