Skip to main content
SpringerLink
Log in

The effect of luminosity-redshift correlation on the analysis of the angular size-redshift relation for radio galaxies

  • Published:
Astrophysics and Space Science Aims and scope Submit manuscript

Abstract

The variation of radio luminosity with redshift and its effect on the analysis of the angular size-redshift (θ –z) relation for a bright radio source sample (s 178 ≥ 10Jy) has been investigated. By assuming a power law dependence of luminosity on redshift of the formP ∼ (1 +z)β, it was found thatβ ≈ 4.4 (with correlation coefficientr ≈ 0.99) for at leastz ≥ 0.3. Correction for such a strongP – (1 +z) correlation when considering theθ –z data for the sample led to a steeperθ –z slope. This could be explained by assuming linear size evolution of the formD ∼ (1 +z)−n withn = 2.8 – 3.3 consistent with both theoretical results and those obtained for more homogeneous source samples.

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

  • Gopal-Krishna and Wiita, P.J.: 1987,Monthly Notices Roy. Astron. Soc. 226, 531.

    Google Scholar 

  • Hooley, A., Longair, M.S., and Riley, J.M.: 1978,Monthly Notices Roy Astron. Soc. 182, 127.

    Google Scholar 

  • Jenkins, C.J., Pooley, G.G., and Riley, J.M.: 1977,Monthly Notices Roy. Astron. Soc. 84, 61.

    Google Scholar 

  • Kapahi, V.K.: 1985,Monthly Notices Roy. Astron. Soc. 24, 19p.

    Google Scholar 

  • Kapahi, V.K.: 1987, in I.A.U. Symp. 124. Observational Cosmology, eds. A. Hewitt, G. Burbidge, and L. Fang (D. Reidel, Dordrecht), p. 251.

    Google Scholar 

  • Kapahi, V.K.: 1989,Astrophys. J. 97, 1.

    Google Scholar 

  • Kapahi, V.K. and Subramanya, C.: 1981, in I.U.A. Symp. 97, Extragalactic radio sources, eds. D.S. Heeschen and M. Wade (D. Reidel, Dordrecht), p. 40.

    Google Scholar 

  • Masson, C.R.: 1980,Astrophys. J. 242, 8.

    Google Scholar 

  • Miley, G.K.: 1968,Nature 218, 933.

    Google Scholar 

  • Miley, G.K.: 1971,Monthly Notices Roy. Astron. Soc. 152, 477.

    Google Scholar 

  • Okoye, S.E. and Onuora, L.I.: 1982,Astrophys. J. 260, 37.

    Google Scholar 

  • Onuora, L.I. and Okoye, S.E.: 1983,Astrophys. J. 270, 360.

    Google Scholar 

  • Oort, M.J.A., Katgert, P., Steeman, F.W., and Windhorst, R.A.: 1987,Astron. Astrophys. 179, 41.

    Google Scholar 

  • Peacock, J.A. and Wall, J.V.: 1981,Monthly Notices Roy. Astron. Soc. 194, 331.

    Google Scholar 

  • Stannard, D. and Neal, D.S.: 1977,Monthly Notices Roy. Astron. Soc. 179, 719.

    Google Scholar 

  • Singal, A.K.: 1988,Monthly Notices Roy. Astron. Soc. 233, 87.

    Google Scholar 

  • Singal, A.K.: 1993,Monthly Notices Roy. Astron. Soc. 263, 139.

    Google Scholar 

  • Ubachukwu, A.A., Okoye, S.E., and Onuora, L.I.: 1991,Astrophys. J. 383, 56.

    Google Scholar 

  • Wardle, J.F.C. and Miley, C.K.: 1974,Astron. Astrophys. 30, 305.

    Google Scholar 

  • Wills, D.: 1979,Astrophys. J. Suppl. 39, 291.

    Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Department of Physics and Astronomy, University of Nigeria, Nsukka, Nigeria

    A. A. Ubachukwu

Authors
  1. A. A. Ubachukwu
    View author publications

    You can also search for this author in PubMed Google Scholar

Rights and permissions

Reprints and permissions

About this article

Cite this article

Ubachukwu, A.A. The effect of luminosity-redshift correlation on the analysis of the angular size-redshift relation for radio galaxies. Astrophys Space Sci 232, 23–25 (1995). https://doi.org/10.1007/BF00627540

Download citation

  • Received:

  • Accepted:

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF00627540

Keywords

Search

Navigation