Abstract
The purpose of this paper is to point out the importance of the observation of the counterjet of subluminals, for it will settle up the question whether quasars redshifts are cosmological or not. If so, from the observed wavelength of the counterjet, one is able to find out the value of Hubble constant H 0. What we observe as an apparent superluminal or subluminal motion is the resultant velocity of Hubble flow and a local ejection. Taking Hubble flow into account, one can explain problems posed for the relativistic beaming model, such as the one-sidedness problem and the ‘Intolerable extension of the deprojected structure of sonie superluminal sources. Our method is applied to two superluminals, 4C73.18 and 3C179, and two subluminals, M87 and 3C84. Our method can also be applied to investigate the problem of the ejection of the quasar from the galaxy in the framework of kinematics. Two quasar-galaxy pairs, Markarian 205-NGC4319 and 3C455-NGC7413, are studied.
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