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An Exploration of Volume Test V/Vm Under Various Values of Deceleration Parameter qo

Published online by Cambridge University Press:  19 July 2016

S. M. Gong(Kung) ,
H. J. Li  and
C. L. Xia
S. M. Gong(Kung)
Affiliation:
Purple Mountain Observatory, Academia Sinica Nanjing China
H. J. Li
Affiliation:
Purple Mountain Observatory, Academia Sinica Nanjing China
C. L. Xia
Affiliation:
Purple Mountain Observatory, Academia Sinica Nanjing China

Abstract

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The problem of volume test, V/Vm, in zero pressure and matter dominated Friedmann universe model is explored under various values of deceleration parameter qo. The following conclusions are drawn. (i) For different values of qo, the change of V/Vm is sensitive at small values of z. Since values of V/Vm are very small at small values of z, this change exerts little effect on the average values of V/Vm. (ii) when values of z and zm are fixed for each member of a sample, large values of qo yield larger values of V/Vm, especially in the case of large z. (iii) For qo<1, the method of volume test is reliable. When qo>2, especially qo>3, this method has to be used with caution at large z.

Type
Chapter XI: Quasi-Stellar Objects: Distribution and General Properties
Information
Symposium - International Astronomical Union , Volume 124: Observational Cosmology , 1987 , pp. 681 - 683
Copyright
Copyright © Reidel 1987 

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