Springer Nature is making SARS-CoV-2 and COVID-19 research free. View research | View latest news | Sign up for updates

A correlation between ellipticity and core-strength in extended radio galaxies

  • 25 Accesses

Abstract

We show that in the case extended radio sources a correlation exists between the fraction of the radio flux retained in the core component and the ellipticity of the underlying galaxy. The correlation is in the sense that stronger cores occur in flatter galaxies. It would seem that there exists a class of intrinsically rounder, redder, massive ellipticals with larger velocity dispersions and metallicities, that can form extended radio sources more efficiently. Thus the occurrence of a radio source appears to be related to the dynamical and chemical evolution of the Galaxy.

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

References

  1. Bridle, A. H. and Fomalont, E.B.:Astron. J. 83, 704.

  2. Dressel, L. L.: 1981,Astrophys. J. 245, 25.

  3. Dressel, L. L. and Condon, J. J.: 1978,Astrophys. J. Suppl. Ser. 36, 53.

  4. de Vaucouleurs, G., de Vaucouleurs, A., and Corwin, H. G.: 1978,Second Reference Catalogue of Bright Galaxies, University of Texas Press.

  5. Ekers, R. D. and Ekers, J. A.: 1973,Astron. Astrophys. 24, 247.

  6. Fomalont, E. B. and Bridle, A. H.: 1978,Astron. J. 83, 725.

  7. Fomalont, E. B., Palimaka, J. J., and Bridle, A. H.: 1978,Astron. J. 85, 981.

  8. Guthrie, B. N. G.: 1980,Astrophys. Space Sci. 70, 211.

  9. Guthrie, B. N. G.: 1981,Monthly Notices Roy. Astron. Soc. 70, 211.

  10. Heckman, T. M.: 1983,Astrophys. J. 273, 511.

  11. Heeschen, D. S.: 1970,Astron. J. 75, 523.

  12. Hummel, E., Kotanyi, C. G., and Ekers, R. D.: 1983,Astron. Astrophys. 127, 205.

  13. Jenkins, C. R.: 1982,Monthly Notices Roy. Astron. Soc. 200, 705.

  14. Kapahi, V. K. and Saikia, D. J.: 1982,J. Astron. Astrophys. 3, 161.

  15. Nilson, P.: 1973,Uppsala General Catalogue of Galaxies, Uppsala.

  16. Sandage, A. and Tammann, G. A.: 1981,A Revised Shapley-Ames Catalogue of Bright Galaxies, Carnegie Institute of Washington.

  17. Sandage, A., Freeman, K. C., and Stokes, N. R.: 1970,Astrophys. J. 160, 831.

  18. Terlevich, R., Davies, R. L., Faber, S. M., and Burstein D.: 1981,Monthly Notices Roy. Astron. Soc. 196, 381.

  19. van den Bergh, S.: 1979,Astrophys. J. 230, L161.

Download references

Author information

Rights and permissions

Reprints and Permissions

About this article

Cite this article

Prabhu, T.P., Kochhar, R.K. A correlation between ellipticity and core-strength in extended radio galaxies. Astrophys Space Sci 102, 29–39 (1984). https://doi.org/10.1007/BF00651059

Download citation

Keywords

  • Radio Source
  • Core Component
  • Velocity Dispersion
  • Chemical Evolution
  • Radio Galaxy