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Deducing the orbit of the radio galaxy 3C 129

Published online by Cambridge University Press:  12 April 2016

K. Nilsson
Affiliation:
Tuorla Observatory, FIN-21500 Piikkiö, Finland
M. Valtonen
Affiliation:
Tuorla Observatory, FIN-21500 Piikkiö, Finland
J.-Q. Zheng
Affiliation:
Tuorla Observatory, FIN-21500 Piikkiö, Finland
G. Byrd
Affiliation:
University of Alabama, Tuscaloosa, Alabama 35487, USA
H. Korhonen
Affiliation:
University of Alabama, Tuscaloosa, Alabama 35487, USA
M. I. Andersen
Affiliation:
Nordic Optical Telescope, Apartado 474, E-38700, La Palma, Spain

Abstract

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We have obtained new optical spectra of the radio galaxy 3C 129 and the giant galaxy close to it. From these spectra we deduce a relative radial velocity of 710 km s−1 between the two galaxies. Using the orbit calculations of Byrd & Valtonen (1978) and the new observations we obtain a new value, 3.3 × 1014M, for the mass of the system.

Type
Part 5. Dark Matter and Clustering
Copyright
Copyright © Astronomical Society of the Pacific 2000

References

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