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Search for Structural Changes in the Cores of “Nearby” Radio Galaxies

Published online by Cambridge University Press:  19 July 2016

E. Preuss  and
W. Alef
E. Preuss
Affiliation:
Max-Planck-Institut für Radioastronomie Auf dem Hügel 69 D-5300 Bonn 1 Fed. Rep. of Germany
W. Alef
Affiliation:
Max-Planck-Institut für Radioastronomie Auf dem Hügel 69 D-5300 Bonn 1 Fed. Rep. of Germany

Extract

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Recent VLBI observations of the central radio components in the lobe-dominated radio galaxies 3C111 (Götz et al. 1987) and 3C390.3 (Alef et al. 1987) show drastic changes in the structure of the compact emission regions. In 3C111 a jet-like feature with two knots and a flux density of 600 mJy which was visible in 1980.4 had disappeared in 1985.4. This implies “superluminal behaviour” with a characteristic speed of ≳ 3c. In 3C390.3, there is also evidence for superluminal motion: radio knots appear to be ejected from the core at a rate of about one every 4 years and move out with an apparent velocity of 4.1 c (Ho = 50 km/s/Mpc throughout this paper) in the direction of the north-west extended lobe.

Type
Chapter VIII: Galaxies and Clusters
Information
Symposium - International Astronomical Union , Volume 124: Observational Cosmology , 1987 , pp. 537 - 541
Copyright
Copyright © Reidel 1987 

References

Alef, W., Götz, M.M.A., Preuss, E., Kellermann, K.I.: 1987, (submitted) Google Scholar
Barthel, P.D., Schilizzi, R.T., Miley, G.K., Jägers, W.J., Strom, R.G.: 1985, Astron. Astrophys. 148, 243 Google Scholar
Blandford, R.D., Königl, A.: 1979, Astrophys. J. 232, 34 Google Scholar
Bridle, A.H., Perley, R.A.: 1984, Ann. Rev. Astron. Astrophys. 22, 319 Google Scholar
Fanaroff, B.L., Riley, J.M.: 1974, Monthly Notices Roy. Astron. Soc. 167, 31P CrossRefGoogle Scholar
Götz, M.M.A., Alef, W., Preuss, E., Kellermann, K.I.: 1987, Astron. Astrophys. (in press) Google Scholar
Graham, D.A., Weiler, K.W., Wielebinski, R.: 1981, Astron. Astrophys. 97, 388 Google Scholar
Jones, D.J.: 1986, JPL Astrophys. preprint No. 122 Google Scholar
Laing, R.A., Riley, J.M., Longair, M.S.: 1983, Monthly Notices Roy. Astron. Soc. 204, 151 Google Scholar
Kühr, H., Nauber, U., Pauliny-Toth, I.I.K., Witzel, A.: 1979, MPIfR Preprint No. 55 Google Scholar
Orr, M.J.L., Browne, I.W.A.: 1982, Monthly Notices Roy. Astron. Soc. 200, 1067 CrossRefGoogle Scholar
Preuss, E., Pauliny-Toth, I.I.K., Witzel, A., Kellermann, K.I., Shaffer, D.B.: 1977, Astron. Astrophys. 54, 297 Google Scholar
Romney, J.D., Alef, W., Pauliny-Toth, I.I.K., Preuss, E., Kellermann, K.I.: 1984, IAU Symp. No. 110, 137 CrossRefGoogle Scholar
Saripalli, L., Gopal-Krishna, , Reich, W., Kühr, H.: 1986, Astron. Astrophys. (in press) Google Scholar
Scheuer, P.A.G., Readhead, A.C.S.: 1979, Nature 277, 182 Google Scholar
Scheuer, P.A.G.: 1984, ESA-SP 213, 149 Google Scholar
Schmitt, J.H.M.M., Reid, M.J.: 1985, Astrophys. J. 289, 120 CrossRefGoogle Scholar