Hostname: page-component-78c5997874-v9fdk Total loading time: 0 Render date: 2024-11-09T15:52:47.448Z Has data issue: false hasContentIssue false
  • English
  • Français

Clustering, Isotropy, and Redshift Cutoff

Published online by Cambridge University Press:  19 July 2016

Patrick S. Osmer
Patrick S. Osmer*
Affiliation:
National Optical Astronomy Observatories, Cerro Tololo Inter-American Observatory, Casilla 603, La Serena, Chile

Extract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

The topics of clustering, isotropy, and redshift cutoff are in reality just different aspects of the problem of the three-dimensional distribution of quasars, assuming, of course that the redshifts are cosmological and therefore an indication of radial distance. The distribution in redshift has additional interest because of the substantial lookback times involved, up to four fifths of the age of the universe. The radial variation of quasar density between redshift zero and two, and the attendant questions of density and luminosity evolution, are discussed elsewhere in this symposium by Green and shall not be treated here. Rather we shall concern ourselves with the behavior at redshifts larger than two and the specific question of a steep decline of quasar density at redshifts near three. For simplicity we may characterize the problem as one of studying either the formation of quasars as we normally see them in a cosmologically short time or of the properties of the universe and its optical depth, should intergalactic absorption contribute significantly to blocking our view at redshift three. Of course other hypotheses are also possible.

Type
V. Cosmological Studies, Clustering, Isotropy etc
Information
Symposium - International Astronomical Union , Volume 119: Quasars , 1986 , pp. 447 - 454
Copyright
Copyright © Reidel 1986 

References

Abell, G.O., and Chicarini, G. (eds.) 1983, in IAU Symposium No. 104, Early Evolution of the Universe and Its Present Structure, (Dordrecht: Reidel).CrossRefGoogle Scholar
Arp, H. 1984a, Ap. J. 285, 547.CrossRefGoogle Scholar
Arp, H. 1984b, ibid. 285, 555.Google Scholar
Burbidge, G.R., Narlikar, J.V., and Hewitt, A. 1985, Nature, 317, 413.CrossRefGoogle Scholar
Clowes, R.G., Cooke, J.A., and Beard, S.M. 1984, M.N.R.A.S. 207, 99.Google Scholar
Clowes, R.G. 1985, M.N.R.A.S. in press.Google Scholar
Dunlop, J.S., Downes, A.J.B., Peacock, J.A., Savage, A., Lilly, S.J., Watson, F.G., and Longair, M.S. 1985, Nature, in press.Google Scholar
Fliche, H.H., Souriau, J.M., and Triay, R. 1982, Astron. Astrophys. 108, 256.Google Scholar
Hawkins, M.R.S. 1985, M.N.R.A.S. 216, 589.Google Scholar
Hazard, C., Terlevich, R., McMahon, R., Turnshek, D., Foltz, C., Stocke, J., and Weymann, R. 1984, M.N.R.A.S. 211, 45P.CrossRefGoogle Scholar
Hazard, C., and McMahon, R. 1985, Nature, 314, 238.Google Scholar
Hewett, P.C., Irwin, M.J., Bunclark, P., Bridgeland, M.T., Kibblewhite, E.J., He, X.T., and Smith, M.G. 1985, M.M.R.A.S. 213, 971.CrossRefGoogle Scholar
Koo, D.C. 1983, in Quasars and Gravitational Lenses, 24th. Liege Colloquium, (Liege: Institute d'Astrophysique), p. 240.Google Scholar
MacAlpine, G.M., and Feldman, F.R. 1982, Ap. J. 261, 412.CrossRefGoogle Scholar
Mardirossian, F., Giuricin, G., and Mezzetti, M. (eds.) 1984, in Clusters and Groups of Galaxies, (Dordrecht: Reidel).Google Scholar
Osmer, P.S. 1981, Ap. J. 247, 762.Google Scholar
Osmer, P.S. 1982, Ap. J. 253, 28.CrossRefGoogle Scholar
Osmer, P.S., and Smith, M.G. 1980, Ap. J. Suppl. 42, 333.Google Scholar
Osmer, P.S. 1984, in Clusters and Groups of Galaxies, eds. Mardirossian, F., Giuricin, G., and Mezzetti, M. (Dordrecht: Reidel), p. 579.Google Scholar
Ostriker, J.P., and Heisler, J. 1984, Ap. J. 278, 1.Google Scholar
Peterson, B.A., Savage, A., Jauncey, D.L., and Wright, A.E. 1982, Ap. J. Lett. 260, L27.CrossRefGoogle Scholar
Sandage, A. 1982, Ap. J. 178, 25.CrossRefGoogle Scholar
Savage, A., and Peterson, B.A. 1983, in IAU Symposium No. 104, Early Evolution of the Universe and Its Present Structure, eds. Abell, G.O. and Chincarini, (Dordrecht: Reidel), p. 57.CrossRefGoogle Scholar
Schmidt, M. 1970, Ap. J. 162, 371.CrossRefGoogle Scholar
Schmidt, M. 1972, ibid. 176, 273.Google Scholar
Schmidt, M., and Green, R.F. 1983, Ap. J. 269, 352.Google Scholar
Schmidt, M., Schneider, D., and Gunn, J. 1985, Ap. J. in press.Google Scholar
Shanks, T., Fong, R., and Boyle, B.J. 1983, Nature, 303, 156.Google Scholar
Shaver, P.A. 1984, Astron. Astrophys. 136, L9.Google Scholar
Shaver, P.A. 1985, Astron. Astrophys. 143, 451.Google Scholar
Smith, M.G. 1978, Vistas in Astronomy, 22, 321.Google Scholar
Wampler, E.J., Robinson, L.B., Baldwin, J.A., and Burbidge, E.M. 1973, Nature, 243, 336.Google Scholar
Webster, A. 1982, M.N.R.A.S. 199, 683.CrossRefGoogle Scholar