Hostname: page-component-586b7cd67f-g8jcs Total loading time: 0 Render date: 2024-11-25T04:38:59.284Z Has data issue: false hasContentIssue false
  • English
  • Français

The Observation of Counterjets of Quasars and Galaxies

Published online by Cambridge University Press:  07 August 2017

S. M. Gong (Kung)
S. M. Gong (Kung)*
Affiliation:
Purple Mountain Astronomical Observatory Chinese Academy of Sciences 2 West Beijing Rd., Nanjing 210008, China

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

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 untolerable extension of the deprojected structure of some 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.

Type
Impact on Astrophysics
Information
Symposium - International Astronomical Union , Volume 156: Developments in Astrometry and their Impacts on Astrophysics , 1993 , pp. 271 - 277
Copyright
Copyright © Kluwer 

References

Arp, H., Pratt, N. and Sulentic, J. 1975, Ap. J., 199, 565 CrossRefGoogle Scholar
Bahcall, J.N., et al., 1967, Ap. J., 149, L11 Google Scholar
Behr, C., et al., 1976, A.J., 81, 147 CrossRefGoogle Scholar
Biretta, J.A. et al., 1988, in Impact of VLBI on Astrophysics and Geophysics, IAU Symp. 129, eds. Reid, M.J. & Moran, J.M., 125 CrossRefGoogle Scholar
Biretta, J.A. and Owen, F.N., 1990, in Parsec-scale Radio Jet, eds. Zensus, J. A. & Pearson, T.J., Cambridge Univ. Press, 37 Google Scholar
Blandford, R.D. and Konigl, A., 1979, Ap. J., 232, 34 Google Scholar
Dishon, G. and Weber, T.A., 1977, Ap. J., 212, 31 Google Scholar
Gong, S.M., 1991, Ap. & Space Sci., 175, 23 Google Scholar
Horak, Z., 1978, Bull. Astro. Inst. Czech., 29, 126; 368 Google Scholar
Li, Q., 1980, Acta Astron. Sinica, 21, 1 Google Scholar
Marr, J.M. et al., 1988, in Impact of VLBI on Astrophysics and Geophysics, IAU Symp. 129, eds. Reid, M.J. & Moran, J.M., 91 Google Scholar
Pearson, T.J. and Zensus, J.A., 1987, in Superluminal Radio Sources, eds. Zensus, J.A. & Pearson, T.J., Cambridge Univ. Press, 1 Google Scholar
Porcas, R.W., 1987, in Superluminal Radio Sources, eds. Zensus, J.A. & Pearson, T.J., Cambridge Univ. Press, 12 Google Scholar
Rees, M.J., 1966, Nature, 211, 468 Google Scholar
Rees, M.J., 1967, M.N., 135,345 Google Scholar
Simon, R.S. et al., 1987 in Superluminal Radio Sources, eds. Zensus, J.A. & Pearson, T.J., Cambridge Univ. Press, 155 Google Scholar
Sulentic, J.W. and Arp, H., 1987, Ap. J., 319, 687 CrossRefGoogle Scholar
Weymann, R.J. et al., 1977, Ap. J. 213, 619.Google Scholar
Wilkinson, P.N. et al., 1990, in Parsec-scale Radio Jet, eds. Zensus, J. A. & Pearson, T.J., Cambridge Univ. Press, 152 Google Scholar