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Paper: Deducing the orbit of the radio galaxy 3C 129
Volume: 209, Small Galaxy Groups, IAU Colloquium 174
Page: 408
Authors: Nilsson, K.; Valtonen, M.; Zheng, J.-Q.; Byrd, G.; Korhonen, H.; Andersen, M. I.
Abstract: 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 times 1014 Modot, for the mass of the system.
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