Orbital dynamics of the radio galaxy 3C 129

Details Orbital dynamics of the radio galaxy 3C 129 Orbital dynamics of the radio galaxy 3C 129

Apr 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978apj...221..481b&link_type=abstract

Astrophysical Journal, Part 1, vol. 221, Apr. 15, 1978, p. 481-485. Research supported by the University of Alabama.

Astronomy and Astrophysics

Astrophysics

12

Astronomical Models, Galactic Radiation, Orbit Calculation, Radio Galaxies, Buoyancy, Ellipses, Gravitational Effects, Orbital Elements

Scientific paper

The radio galaxy 3C 129 possesses a long radio tail which is shaped in the first approximation like a segment of an ellipse. This segment is used to reconstruct the whole orbit of 3C 129 around a nearby supergiant galaxy, and the complete set of orbital parameters is calculated under two interpretations of the tail. The period of the orbit is about 3.6 billion years, and as such it is by far the longest known binary period. Possible perturbations by the nearby radio galaxy 3C 129.1 and the effects of buoyancy on the shape of the tail are discussed. The dynamical ages are compared with the properties of radiating electron populations in the tail.

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