The Effects of Inhomogeneities on Evaluating the Deceleration Parameter Q 0
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.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- July 1995
- DOI:
- 10.1086/175854
- arXiv:
- arXiv:astro-ph/9511108
- Bibcode:
- 1995ApJ...447...35K
- Keywords:
-
- COSMOLOGY: LARGE-SCALE STRUCTURE OF UNIVERSE;
- COSMOLOGY: THEORY;
- Astrophysics;
- General Relativity and Quantum Cosmology;
- High Energy Physics - Phenomenology
- E-Print:
- 16 pages, 7 figures in separate uuencoded file