Open AccessDecaying A cosmologies and statistical properties of gravitational lenses
Author(s) -
Larissa F. Torres,
I. Waga
Publication year - 1996
Publication title -
monthly notices of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.058
H-Index - 383
eISSN - 1365-2966
pISSN - 0035-8711
DOI - 10.1093/mnras/279.3.712
Subject(s) - physics , omega , lambda , gravitational lens , cosmology , hubble's law , astrophysics , gravitation , cosmological constant , range (aeronautics) , cosmological model , mathematical physics , dark energy , redshift , classical mechanics , quantum mechanics , galaxy , composite material , materials science
In this paper we investigate the statistical properties of gravitational lenses for models in which a cosmological term decreases with time as \Lambda \propto a^{-m}, where a is the scale factor and m is a parameter (0 \leq m < 3). We show that for given low values of the present matter density parameter \Omega_{m0}, there is a wide range of values for m for which the lensing rate is significantly smaller than that in cosmological constant (\Lambda) models. We also show that models with low \Omega_{m0} and m\stackrel{>}{\sim}2 have high likelihood to reproduce the observed lens statistics in the HST snapshot survey
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