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The Angular Size Distribution of Radio Sources at Low Flux Densities

Published online by Cambridge University Press:  14 August 2015

Ann Downes
Ann Downes*
Affiliation:
Mullard Radio Astronomy Observatory, Cavendish Laboratory, Madingley Road, Cambridge CB3 OHE, U.K.

Abstract

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Observations of complete samples of extragalactic radio sources at low and intermediate flux densities are described. Many types of source are found. The angular sizes form a smooth extrapolation from higher flux densities, and can be predicted from the known properties of samples at high flux density either with linear size evolution (for Ω = 1 or Ω = 0 Universes) or without linear size evolution (for Ω = 0). The question of whether such evolution is required therefore remains open.

Type
Research Article
Information
Symposium - International Astronomical Union , Volume 97: Extragalactic Radio Sources , 1982 , pp. 393 - 400
Copyright
Copyright © Reidel 1982 

References

Allington-Smith, J.R.: 1982, Mon. Not. Roy. Astron. Soc., in press.Google Scholar
Allington-Smith, J.R., Perryman, M.A.C., Longair, M.S., Gunn, J.E. and Westphal, J.A.: in preparation.Google Scholar
Benn, C.R., Grueff, G., Vigotti, M. and Wall, J.V.: in preparation.Google Scholar
Downes, A.J.B., Longair, M.S. and Perryman, M.A.C.: 1981, Mon. Not. Roy. Astron. Soc., 197, in press.CrossRefGoogle Scholar
Ekers, R.D. and Miley, G.K.: 1977, in IAU 74 “Radio astronomy and cosmology”, ed. Jauncey, D., p. 109.Google Scholar
Fielden, J., Allington-Smith, J.R., Benn, C.R., Downes, A.J.B., Longair, M.S. and Perryman, M.A.C.: in preparation.Google Scholar
Jenkins, C.J., Pooley, G.G. and Riley, J.M.: 1977, Mem. Roy. Astron. Soc., 84, 61.Google Scholar
Kapahi, V.K.: 1975, Mon. Not. Roy. Astron. Soc., 172, 513.Google Scholar
Kapahi, V.K.: 1977, in IAU 74 “Radio astronomy and cosmology”, ed. Jauncey, D., p. 119.Google Scholar
Kapahi, V.K.: 1981, Astron. Astrophys. Suppl., 43, 381.Google Scholar
Katgert-Merkelijn, J., Lari, C. and Padrielli, L.: 1980, Astron. Astrophys. Suppl., 40, 91.Google Scholar
Peacock, J.A. and Gull, S.F.: 1981, Mon. Not. Roy. Astron. Soc., 196, 611.CrossRefGoogle Scholar
Peacock, J.A. and Wall, J.V.: 1981, Mon. Not. Roy. Astron. Soc., 194, 331.Google Scholar
Peacock, J.A. and Wall, J.V.: 1982, Mon. Not. Roy. Astron. Soc., in press.Google Scholar
Pearson, T.J. and Kus, A.: 1978, Mon. Not. Roy. Astron. Soc., 182, 273.CrossRefGoogle Scholar
Perryman, M.A.C.: 1979a, Mon. Not. Roy. Astron. Soc., 187, 223.Google Scholar
Perryman, M.A.C.: 1979b, Mon. Not. Roy. Astron. Soc., 187, 683.Google Scholar
Perryman, M.A.C., Longair, M.S., Fielden, J., Gunn, J.E. and Westphal, J.A.: in preparation.Google Scholar
Swarup, G.: 1975, Mon. Not. Roy. Astron. Soc., 172, 501.CrossRefGoogle Scholar
Swarup, G.: 1977, Bull. Astron. Soc. India, 5, 36.Google Scholar
Wall, J.V., Pearson, T.J. and Longair, M.S.: 1980, Mon. Not. Roy. Astron. Soc., 193, 683.Google Scholar