Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983apj...273l..11d&link_type=abstract
Astrophysical Journal, Part 2 - Letters to the Editor (ISSN 0004-637X), vol. 273, Oct. 1, 1983, p. L11-L15. Research supported b
Astronomy and Astrophysics
Astrophysics
111
Galactic Structure, Radio Galaxies, Spiral Galaxies, Astronomical Maps, Continuous Spectra, Galactic Nuclei, Radiant Flux Density
Scientific paper
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.
Bignell R. C.
Crane Patrick C.
Davis Lindsey Elspeth
Duric Neb
Seaquist Ernest R.
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