Advertisement

Astrophysics and Space Science

, Volume 136, Issue 1, pp 11–15 | Cite as

Evidence for a low-density inflationary universe?

  • L. I. Onuora
Article

Abstract

The inflationary unvierse model predicts the density parameter Ω0 to be ∼ 1.0 with the cosmological constant Λ0 usually taken to be zero, whereas observational estimates give Ω0≤0.2 and Λ0∼10-57 cm−2. It was found, however, that the observed variation of angular diameter with redshift for extragalactic radio sources could be interpreted in terms of a low density universe with linear size evolution of the sources for either an inflationary model with ∧≠0 or an open model with ∧=0.

Keywords

Open Model Radio Source Linear Size Density Parameter Size Evolution 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Audouze, J.: 1984, in G. Setti and L. Van Hove (eds.),Large-Scale Structure of the Universe. Cosmology and Fundamental Physics, Proceedings of the First ESO-CERN Symposium, p. 293.Google Scholar
  2. Eales, S. A.: 1985,Monthly Notices Roy. Astron. Soc. 217, 179.Google Scholar
  3. Ellis, J.: 1984, in G. Setti and L. Van Hove (eds.),Large-Scale Structure of the Universe. Cosmology and Fundamental Physics, Proceedings of the First ESO-CERN Symposium, p. 435.Google Scholar
  4. Faber, S. M.: 1984, in G. Setti and L. Van Hove (eds.),Large-Scale Structure of the Universe. Cosmology and Fundamental Physics, Proceedings of the First ESO-CERN Symposium, p. 187.Google Scholar
  5. Fang, L. Z., Kiang, T., Cheng, F. H., and Hu, F. X.: 1982,Quart. J. Roy. Astron. Soc. 23, 363.Google Scholar
  6. Geller, M. J. and Davis, M.: 1978,Astrophys. J. 225, 1.Google Scholar
  7. Guth, A. H.: 1981,Phys. Rev. D 23, 347.Google Scholar
  8. Kapahi, V. K.: 1975,Monthly Notices Roy. Astron. Soc. 172, 513.Google Scholar
  9. Kapahi, V. K.: 1985,Monthly Notices Roy. Astron. Soc. 214, 19p.Google Scholar
  10. Klapdor, H. V. and Grotz, K.: 1986,Astrophys. J. 301, L39.Google Scholar
  11. Linde, A. D.: 1982,Phys. Letters 108B, 389.Google Scholar
  12. Loh, E. D. and Spillar, E. J.: 1986,Astrophys. J. 307, L1.Google Scholar
  13. Miley, G. K.: 1968,Nature 218, 933.Google Scholar
  14. Miley, G. K.: 1971,Monthly Notices Roy. Astron. Soc. 52, 477.Google Scholar
  15. Nanopoulos, D. V.: 1984, in G. Setti and L. Van Hove (eds.),Large-Scale Structure of the Universe. Cosmology and Fundamental Physics Proceedings of the First ESO-CERN Symposium, p. 349.Google Scholar
  16. Okoye, S. E. and Onuora, L. I.: 1986,Astrophys. Space Sci. 122, 267.Google Scholar
  17. Peebles, P. J. E.: 1979,Astron. J. 84, 730.Google Scholar
  18. Peebles, P. J. E.: 1984,Astrophys. J. 284, 439.Google Scholar
  19. Sandage, A. and Tammann, G. A.: 1984, in G. Setti and L. Van Hove (eds.),Large-Scale Structure of the Universe, Cosmology and Fundamental Physics, Proceedings of the First ESO-CERN Symposium, p. 127.Google Scholar
  20. Sciama, D. W.: 1983, in G. O. Abell and C. Chincari (eds.),Early Evolution of the Universe and Its Present Structure, D. Reidel Publ. Co., Dordrecht, Holland, p. 493.Google Scholar
  21. Silk, J.: 1986,Nature 323, 673.Google Scholar
  22. Wardle, J. F. C. and Pottasch, R.: 1977,Ann. N. Y. Acad. Sci. 302, 605.Google Scholar
  23. Wills, D.: 1979,Astrophys. J. Suppl. 39, 291.Google Scholar
  24. Zel'dovich, Ya. B.: 1968,Usp. Fiz. Nauk 95, 209.Google Scholar

Copyright information

© D. Reidel Publishing Company 1987

Authors and Affiliations

  • L. I. Onuora
    • 1
  1. 1.Department of Physics and AstronomyUniversity of NigeriaNsukkaNigeria

Personalised recommendations