Skip to main content
SpringerLink
Log in

Physical conditions in steep-spectrum radio sources

  • Published:
Astronomy Reports Aims and scope Submit manuscript

Abstract

Interplanetary scintillation observations of the radio sources 4C 31.04, 3C 67, 4C 34.07, 4C 34.09, OE 131, 3C 93.1, OF 247, 3C 147, 3C 173, OI 407, 4C 68.08, 3C186, 3C 190, 3C 191, 3C 213.1, 3C 216, 3C 237, 3C 241, 4C 14.41, 3C 258, and 3C 266 have been carried out at 102 MHz. Scintillations were detected for nearly all the sources. The integrated flux densities and flux densities of the scintillating components are estimated. Nine of the 21 sources have a low-frequency turnover in their spectra; three of the sources have high-frequency turnovers. The physical parameters are estimated for sources with turnovers in the spectra of their compact components. In most of the quasars, the relativistic-plasma energy exceeds the magnetic-field energy, while the opposite is true of most of the radio galaxies. Empirical relations between the size of the compact radio source and its magnetic field and relativistic-electron density are derived.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  1. J. A. Peacock and J. V. Wall, Mon. Not. R. Astron. Soc. 198, 843 (1982).

    ADS  Google Scholar 

  2. V. K. Kapahi, Astron. Astrophys. Suppl. Ser. 43, 381 (1981).

    ADS  Google Scholar 

  3. H. S. Sanghera, D. J. Saikia, E. Lüdke, et al., Astron. Astrophys. 295, 629 (1995).

    ADS  Google Scholar 

  4. V. S. Artyukh, S. A. Tyul’bashev, and P. A. Chernikov, Astron. Zh. 76, 3 (1999).

    Google Scholar 

  5. K. J. Kellerman, Astrophys. J. 140, 969 (1964).

    ADS  Google Scholar 

  6. V. S. Artyukh, Astron. Zh. 58, 208 (1981).

    ADS  Google Scholar 

  7. V. S. Artyukh and S. A. Tyul’bashev, Astron. Zh. 73, 669 (1996).

    Google Scholar 

  8. http://www.prao.psn.ru/papers/tyulbashev

  9. J. M. Wrobel and R. S. Simon, Astrophys. J. 309, 593 (1986).

    Article  ADS  Google Scholar 

  10. R. A. Perley, Astron. J. 87, 859 (1982).

    Article  ADS  Google Scholar 

  11. B. J. Geldzahler and A. Witzel, Astron. J. 86, 1306 (1981).

    ADS  Google Scholar 

  12. I. I. K. Pauliny-Toth, K. I. Kellermann, M. M. Davis, et al., Astron. J. 77, 265 (1972).

    ADS  Google Scholar 

  13. P. C. Gregory and J. J. Condon, Astrophys. J., Suppl. Ser. 75, 1011 (1991).

    Article  ADS  Google Scholar 

  14. A. Witzel, P. Veron, and M. P. Veron, Astron. Astrophys. 11, 171 (1971).

    ADS  Google Scholar 

  15. H. Kuehr, A. Witzel, I. I. K. Pauliny-Toth, et al., Astron. Astrophys. Suppl. Ser. 45, 367 (1981).

    ADS  Google Scholar 

  16. J. D. H. Pilkington and P. F. Scott, Mem. R. Astron. Soc. 69, 183 (1965).

    ADS  Google Scholar 

  17. C. Fanti, R. Fanti, P. Parma, et al., Astron. Astrophys. 143, 292 (1985).

    ADS  Google Scholar 

  18. Rendong Nan, R. T. Schilizzi, C. Fanti, et al., Astron. Astrophys. 252, 513 (1991).

    ADS  Google Scholar 

  19. R. E. Spencer, J. C. McDowell, M. Charlesworth, et al., Mon. Not. R. Astron. Soc. 240, 657 (1989).

    ADS  Google Scholar 

  20. D. Dallacasa, PhD Thesis, Bologna (1993).

  21. D. Dallacasa, C. Fanti, R. Fanti, et al., Astron. Astrophys. 295, 27 (1995).

    ADS  Google Scholar 

  22. T. J. Pearson, R. A. Perley, and A. C. S. Readhead, Astron. J. 90, 738 (1985).

    Article  ADS  Google Scholar 

  23. C. E. Akujor, R. E. Spencer, F. J. Zhang, et al., Mon. Not. R. Astron. Soc. 250, 215 (1991).

    ADS  Google Scholar 

  24. R. B. Phillips and R. L. Mutel, Astrophys. J. 244, 19 (1981).

    Article  ADS  Google Scholar 

  25. F. N. Owen, R. W. Porcas, and S. G. Neff, Astron. J. 83, 1009 (1978).

    ADS  Google Scholar 

  26. W. J. M. van Breugel, G. Miley, and T. Heckman, Astron. J. 89, 5 (1984).

    ADS  Google Scholar 

  27. C. E. Akujor, R. E. Spencer, and P. N. Wilkinson, Mon. Not. R. Astron. Soc. 244, 362 (1990).

    ADS  Google Scholar 

  28. W. J. M. van Breugel, C. Fanti, R. Fanti, et al., Astron. Astrophys. 256, 56 (1992).

    ADS  Google Scholar 

  29. C. E. Akujor and S. T. Garrington, Astron. Astrophys. Suppl. Ser. 112, 235 (1995).

    ADS  Google Scholar 

  30. P. N. Wilkinson, A. C. S. Readhead, G. H. Purcell, et al., Nature 269, 764 (1977).

    Article  ADS  Google Scholar 

  31. A. C. S. Readhead, P. F. Napier, and R. C. Bignell, Astrophys. J. Lett. 237, 55 (1980).

    Article  ADS  Google Scholar 

  32. R. S. Simon, A. C. S. Readhead, A. T. Moffet, et al., Astrophys. J. 236, 707 (1980).

    Article  ADS  Google Scholar 

  33. R. S. Simon, A. C. S. Readhead, A. T. Moffet, et al., Astrophys. J. 354, 140 (1990).

    Article  ADS  Google Scholar 

  34. F. J. Zhang, C. E. Akujor, H. S. Chu, et al., Mon. Not. R. Astron. Soc. 250, 650 (1991).

    ADS  Google Scholar 

  35. W. Alef, E. Preuss, K. I. Kellermann, et al., IAU Symp. 129: The Impact of VLBI on Astrophysics and Geophysics, Ed. by M. J. Reid and J. M. Moran (Reidel, Dordrecht, 1988), p. 95.

    Google Scholar 

  36. R. L. White and R. H. Becker, Astrophys. J., Suppl. Ser. 79, 331 (1992).

    Article  ADS  Google Scholar 

  37. A. Ficarra, G. Grueff, and G. Tomassetti, Astron. Astrophys. Suppl. 59, 255 (1985).

    ADS  Google Scholar 

  38. P. J. S. Williams, S. Kenderdine, and J. E. Baldwin, Mem. R. Astron. Soc. 70, 53 (1966).

    ADS  Google Scholar 

  39. T. A. T. Spoelstra, A. R. Patnaik, and Gopal-Krishna, Astron. Astrophys. 152, 38 (1985).

    ADS  Google Scholar 

  40. T. V. Cawthorne, P. A. G. Scheuer, I. Morison, et al., Mon. Not. R. Astron. Soc. 219, 883 (1986).

    ADS  Google Scholar 

  41. R. E. Spencer, R. T. Schilizzi, C. Fanti, et al., Mon. Not. R. Astron. Soc. 250, 225 (1991).

    ADS  Google Scholar 

  42. I. Fejes, R. W. Porcas, and C. E. Akujor, Astron. Astrophys. 257, 459 (1992).

    ADS  Google Scholar 

  43. T. J. Pearson and A. C. S. Readhead, Astrophys. J. 328, 114 (1988).

    Article  ADS  Google Scholar 

  44. P. D. Barthel, T. J. Pearson, and A. C. S. Readhead, Astrophys. J. 329, L51 (1988).

    Article  ADS  Google Scholar 

  45. T. J. Pearson and A. C. S. Readhead, Astrophys. J. 248, 61 (1981).

    Article  ADS  Google Scholar 

  46. R. A. Preston, D. D. Morabito, J. G. Williams, et al., Astron. J. 90, 1599 (1985).

    Article  ADS  Google Scholar 

  47. A. G. Polatidis, P. N. Wilkinson, W. Xu, et al., Astrophys. J., Suppl. Ser. 98, 1 (1995).

    Article  ADS  Google Scholar 

  48. R. Genzel, I. I. K. Pauliny-Toth, E. Preuss, et al., Astron. J. 81, 1084 (1976).

    Article  ADS  Google Scholar 

  49. I. I. K. Pauliny-Toth, A. Witzel, E. Preuss, et al., Astron. J. 83, 451 (1978).

    Article  ADS  Google Scholar 

  50. F. N. Owen, S. R. Spangler, and W. D. Cotton, Astron. J. 85, 351 (1980).

    Article  ADS  Google Scholar 

  51. B. Anderson and W. Donaldson, Mon. Not. R. Astron. Soc. 137, 81 (1967).

    ADS  Google Scholar 

  52. A. Wright and R. E. Otrupcek, Bull. Inf. Centre Donnees Stellaires 41, 47 (1992).

    ADS  Google Scholar 

  53. D. W. Murphy, I. W. A. Browne, and R. A. Perley, Mon. Not. R. Astron. Soc. 264, 298 (1993).

    ADS  Google Scholar 

  54. L. Padrielli, W. Eastman, L. Gregorini, et al., Astron. Astrophys. 249, 351 (1991).

    ADS  Google Scholar 

  55. R. G. Strom, J. M. Riley, H. Spinrad, et al., Astron. Astrophys. 227, 19 (1990).

    ADS  Google Scholar 

  56. R. Liu and G. Pooley, Mon. Not. R. Astron. Soc. 249, 343 (1991).

    ADS  Google Scholar 

  57. V. S. Artyukh, Tr. Fiz. Inst. im. P. N. Lebedeva 189, 223 (1988).

    Google Scholar 

  58. V. S. Artyukh and M. A. Ogannisyan, Pis’ma Astron. Zh. 14, 706 (1988).

    ADS  Google Scholar 

  59. D. Downes and A. Maxwell, Astrophys. J. 146, 653 (1966).

    Article  ADS  Google Scholar 

  60. V. S. Artyukh, A. V. Zasov, and S.A. Tyul’bashev, Pis’ma Astron. Zh. 21, 723 (1995).

    ADS  Google Scholar 

  61. V. A. Razin, Izv. Vyssh. Uchebn. Zaved., Radiofiz. 3, 921 (1960).

    Google Scholar 

  62. V. N. Tsytovich, Nonlinear Effects in Plasma (Nauka, Moscow, 1967), p. 287.

    Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Pushchino Radio Astronomy Observatory, Astro Space Center, Lebedev Institute of Physics, Leninskii pr. 53, Moscow, 117924, Russia

    S. A. Tyul’bashev

  2. Sternberg Astronomical Institute, Universitetskii pr. 13, Moscow, 119899, Russia

    P. A. Chernikov

Authors
  1. S. A. Tyul’bashev
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. P. A. Chernikov
    View author publications

    You can also search for this author in PubMed Google Scholar

Additional information

__________

Translated from Astronomicheski\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l} \) Zhurnal, Vol. 77, No. 5, 2000, pp. 331–344.

Original Russian Text Copyright © 2000 by Tyul’bashev, Chernikov.

Rights and permissions

Reprints and permissions

About this article

Cite this article

Tyul’bashev, S.A., Chernikov, P.A. Physical conditions in steep-spectrum radio sources. Astron. Rep. 44, 286–297 (2000). https://doi.org/10.1134/1.163852

Download citation

  • Received:

  • Issue Date:

  • DOI: https://doi.org/10.1134/1.163852

Keywords

Search

Navigation