Gravitational lensing statistics as a probe of dark energy

被引：31

作者：

Zhu, ZH ^{[1
]}

机构：

[1] Chinese Acad Sci, Beijing Astron Observ, Beijing 100012, Peoples R China

[2] Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China

来源：

MODERN PHYSICS LETTERS A | 2000年 / 15卷 / 16期

基金：

中国国家自然科学基金;

关键词：

D O I：

10.1142/S0217732300001304

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

By using the comoving distance, we derive an analytic expression for the Optical depth of gravitational lensing, which depends on the redshift to the source and the cosmological model characterized by the cosmic mass density parameter Omega(m), the dark energy density parameter Omega(x) and its equation of state omega(x) = p(x)/p(x). It is shown that, the larger the dark energy density and the more negative its pressure, the higher is the gravitational lensing probability This fact can provide an independent constraint for dark energy.

引用

页码：1023 / 1029

页数：7

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