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Faint Galaxy Number Counts

Published online by Cambridge University Press:  12 April 2016

T. Shanks ,
P.R.F. Stevenson ,
R. Fong  and
H.T. Mac Gillivray
T. Shanks
Affiliation:
Physics Department, University of Durham, England
P.R.F. Stevenson
Affiliation:
Physics Department, University of Durham, England
R. Fong
Affiliation:
Physics Department, University of Durham, England
H.T. Mac Gillivray
Affiliation:
Royal Observatory, Edinburgh

Abstract

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Using photographic data obtained from the U.K. Schmidt and Anglo-Australian telescopes we have determined galaxy number counts in the range 17m≤B≤23m and 15mm≤R≤22m. By comparing our observations with models we find that the blue counts show strong evidence for galaxy luminosity evolution. We find that the red counts are better fitted by non-evolving models and that, here, the effects of the cosmological deceleration parameter, qo, and luminosity evolution are comparable. We discuss the implications of these results, with particular reference to the prospects of using the red counts to obtain constraints on qo.

Type
Research Article
Information
International Astronomical Union Colloquium , Volume 78: Astronomy with Schmidt-type telescopes , 1984 , pp. 499 - 505
Copyright
Copyright © Reidel 1984

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