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Title:
The Effects of Inhomogeneities on Evaluating the Deceleration Parameter Q 0
Authors:
Kantowski, R.; Vaughan, T.; Branch, D.
Publication:
Astrophysical Journal v.447, p.35 (ApJ Homepage)
Publication Date:
07/1995
Origin:
APJ; KNUDSEN
Astronomy Keywords:
COSMOLOGY: LARGE-SCALE STRUCTURE OF UNIVERSE, COSMOLOGY: THEORY
DOI:
10.1086/175854
Bibliographic Code:
1995ApJ...447...35K

Abstract

Analytic expressions for distance-redshift relations that have been corrected for the effects of some inhomogeneities in the Friedmann-Robertson-Walker (FRW) mass density are used to illustrate the significance of inhomogeneities in a determination of q0 made by using Type Ia supernovae. The value of q0 inferred from a given set of observations depends on the fractional amount of matter in inhomogeneities and is up to 50% larger than that obtained by using the standard Mattig m-z result for pure-dust FRW models.

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