Advertisement

Journal of Astrophysics and Astronomy

, Volume 16, Issue 1, pp 1–36 | Cite as

The radio structure of 45 quasars atz < 1.5

  • V. K. Kapahi
Article

Abstract

Radio maps at 5 GHz with an angular resolution of 1 to 2 arcsec and a dynamic range ≳ 200:1 are presented for a sample of 45 radio quasars at redshifts between 0.2 and 1.5. The sources were imaged from observations made with the Very Large Array with the aim of investigating the epoch dependence of misalignments and asymmetries in their extended radio structure. Maps of some of the larger radio sources are presented also at a frequency of 1.5 GHz with a typical angular resolution of ≈ 4 arcsec. The radio structure of most of the quasars reported here has been delineated in considerably greater detail than available in the literature.

Key words

Quasars active galactic nuclei radio structure 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Argue, A. N., Kenworthy, C. M. 1972,Mon. Not. R. astr. Soc,160, 197.ADSGoogle Scholar
  2. Argue, A. N., Kenworthy, C. M., Stewart, P. M. 1973,Astrophys. Lett.,14, 99.ADSGoogle Scholar
  3. Barthel, P. D., Miley, G. K. 1988,Nature,333, 319.CrossRefADSGoogle Scholar
  4. Barthel, P.D., Miley, G. K., Schilizzi, R.T., Lonsdale, C. J. 1988,Astr. Astrophys. Suppl.,Ser.,73, 515.ADSGoogle Scholar
  5. Bolton, J. G., Shimmins, A. J., Ekers, J., Kinman, T. D., Lamia, E., Wirtanen, C. A. 1966,Astrophys. J.,144, 1229.CrossRefADSGoogle Scholar
  6. Fanti, C., Fanti, R., Ficarra, A., Formaggini, L., Giovannini, G., Lari, G., Padrielli, L. 1975,Astr. Astrophys. Suppl,19, 143. 975.ADSGoogle Scholar
  7. Ghigho, F. 1977,Astrophys. J. Suppl,35, 359.CrossRefADSGoogle Scholar
  8. Hewitt, A., Burbidge, G. 1993,Astrophy. J. Suppl Ser.,87, 451.CrossRefADSGoogle Scholar
  9. Hintzen, P., Ulvestad, J., Owen, F. 1983,Astr. J.,88, 709.CrossRefADSGoogle Scholar
  10. Kapahi, V. K. 1987, inObservational Cosmology, Eds. A. Hewitt, G. Burbidge & L. Z. Fang (Dordrecht: D. Reidel) p. 252.Google Scholar
  11. Kapahi, V.K. 1990,Curr. Sci.,59, 561.ADSGoogle Scholar
  12. Kapahi, V. K., Saikia, D. J. 1982,J. Astrophys. Astr.,3, 465.ADSGoogle Scholar
  13. McEwan, N. J., Browne, I. W. A., Crowther, J. H. 1975,Mem. R. astr. Soc,80, 1.ADSGoogle Scholar
  14. Miley, G. K., Hartsuijker, A. 1978,Astr. Astrophys. Suppl. Ser.,34, 129.ADSGoogle Scholar
  15. Orr, M. J. L., Browne, I. W. A. 1982,Mon. Not. R. astr. Soc,200, 1067.ADSGoogle Scholar
  16. Potash, R. I., Wardle, J. F. C. 1979,Astr. J.,84, 707.CrossRefADSGoogle Scholar
  17. Price, R., Gower, A. C., Hutchings, J. B., Talon, S., Duncan, D., Ross, G. 1993,Astrophys. J. Suppl Ser.,86, 365.CrossRefADSGoogle Scholar
  18. Riley, J., Pooley, G. 1975,Mon. Not. R. astr. Soc,80, 105.ADSGoogle Scholar
  19. Singal, A.K.1988,Mon. Not. R. astr. Soc,233, 870.Google Scholar
  20. Stannard, D., Neal, D. 1977,Mon. Not. R. astr. Soc,179, 719.ADSGoogle Scholar
  21. Veron, M.P., Veron, P. 1989,A Catalogue of Quasars end Active Nuclei (4th Edition), ESO, Germany.Google Scholar
  22. Wills, B. J. 1976,Astr. J.,81, 1031.CrossRefADSGoogle Scholar
  23. Wills, D. 1978,Mon. Not. R. astr. Soc,184, 559.ADSGoogle Scholar
  24. Wills, D. 1979,Astrophys. J. Suppl,39, 291.CrossRefADSGoogle Scholar
  25. Wills, B. J., Wills, D., Douglas, J. 1973,Astr. J.,78, 521.CrossRefADSGoogle Scholar

Copyright information

© Indian Academy of Sciences 1995

Authors and Affiliations

  • V. K. Kapahi
    • 1
  1. 1.National Centre for Radio AstrophysicsTata Institute of Fundamental ResearchPuneIndia

Personalised recommendations