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Determining the cosmic equation of state from gravitational lensing
Cao L(曹莉); Zhu ZH(朱宗宏)
1999
Source PublicationChinese Physics Letters
ISSN0256-307X
Volume16Issue:12Pages:934
AbstractAn independent method is proposed to determine the equation of state, omega(x) equivalent to p(x)/rho(x), for the dark energy component in the universe. This method is based on gravitational lensing statistics. An analytically simple expression for the optical depth of gravitational lensing in general Friedmann-Robertson-Walker cosmologies with dark energy component is derived. It is shown that for flat universe the optical depth depends sensitively on the redshift to the source z(s) and the equation of state omega(x), which makes the method proposed here efficient and robust.
Language英语
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/48831
Collection中国科学院国家天文台
Affiliation中国科学院国家天文台
First Author AffilicationNational Astronomical Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Cao L,Zhu ZH. Determining the cosmic equation of state from gravitational lensing[J]. Chinese Physics Letters,1999,16(12):934.
APA 曹莉,&朱宗宏.(1999).Determining the cosmic equation of state from gravitational lensing.Chinese Physics Letters,16(12),934.
MLA 曹莉,et al."Determining the cosmic equation of state from gravitational lensing".Chinese Physics Letters 16.12(1999):934.
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