NGC326 - A radio galaxy with a precessing beam

Details NGC326 - A radio galaxy with a precessing beam NGC326 - A radio galaxy with a precessing beam

Dec 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978natur.276..588e&link_type=abstract

Nature, vol. 276, Dec. 7, 1978, p. 588-590.

Astronomy and Astrophysics

Astronomy

105

Astronomical Models, Beams (Radiation), Extragalactic Radio Sources, Precession, Radio Galaxies, Galactic Rotation, Radio Astronomy, Radio Spectra, Symmetry

Scientific paper

A precessing beam model which accounts for the 180-deg symmetry of the B20055+26 (4C26.03) radio source is applied in a study of the NGC 326 radio galaxy. The high degree of symmetry and fit to the model indicates a fairly uniform rotation of a beam which is offset from the rotation axis by a relatively large angle; the beam generates the radiating region at a constant distance from the galaxy. Two explanations for the rotating offset beam are considered, and a rough estimate of the time scales is obtained from the observed steepening of the radio spectrum.

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