CONSTRAINTS ON THE UNIVERSE WITH A DECAYING COSMOLOGICAL CONSTANT FROM A NUMBER COUNT OF FAINT GALAXIES

被引：15
|
作者：
YOSHII, Y [1 ]
SATO, K [1 ]
机构：
[1] UNIV TOKYO,FAC SCI,DEPT PHYS,TOKYO 113,JAPAN
来源：
ASTROPHYSICAL JOURNAL | 1992年 / 387卷 / 01期
关键词：
COSMOLOGY; OBSERVATIONS; THEORY; GALAXIES; PHOTOMETRY;
D O I：
10.1086/186293
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Cosmological parameters of a spatially flat universe with a decaying cosmological constant-LAMBDA that is proposed by Peebles and Ratra are constrained from recent observations of number count of faint galaxies in the blue and near-infrared passbands. We determine possible combinations of density parameter OMEGA-0 and the index alpha which controls the decaying rate of LAMBDA. It is found that the number count data indicate OMEGA-0 = 0.3-0.5 for a possible range of alpha, and that the high-density OMEGA-0 = 1 universe with zero space curvature is strongly disfavored by these data.
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页码：L7 / L11
页数：5
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