Rethinking lensing and Λ

被引：27

作者：

Keeton, CR ^{[1
]}

机构：

[1] Univ Chicago, Dept Astron & Astrophys, Chicago, IL 60637 USA

来源：

ASTROPHYSICAL JOURNAL | 2002年 / 575卷 / 01期

关键词：

cosmological parameters; galaxies : evolution; gravitational lensing;

D O I：

10.1086/342558

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Strong gravitational lensing has traditionally been one of the few phenomena said to oppose a large cosmological constant; many analyses of lens statistics have given upper limits on Omega(Lambda) that are marginally inconsistent with the concordance cosmology. Those conclusions were based on models in which the predicted number counts of galaxies at moderate redshifts (z similar to 0.5-1) increased significantly with Omega(Lambda). I argue that the models should now be calibrated by counts of distant galaxies. When this is done, lens statistics lose most of their sensitivity to the cosmological constant.

引用

页码：L1 / L4

页数：4