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resolvingthemassdiscrepancybetweenstrongandweaklensingmethods
Qian Zheng
2008
Source Publicationchinesejournalofastronomyandastrophysics
ISSN1009-9271
Volume8Issue:5Pages:489
AbstractWe readdress the outstanding cluster mass discrepancy between strong and weak gravitational lensing techniques utilizing updated data of both giant arcs and weak lensing measurements from the literature. We find that the systematically higher values of cluster masses revealed by strong lensing can be attributed to the oversimplification of the lensing model when estimating the cluster mass enclosed within the giant arcs. This arises because inhomogeneities and substructures in the central cores of clusters may invalidate the spherical symmetry assumption used widely in previous applications. When a more realistic modeling of the arcs is used, then the masses by strong lensing agree fairly well with those given by weak lensing when both are extrapolated to the same cluster regions. We conclude that as of now no significant discrepancy has been found among different cluster mass estimators including optical galaxies, X-ray gas and lensing.
Language英语
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/51780
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
Qian Zheng. resolvingthemassdiscrepancybetweenstrongandweaklensingmethods[J]. chinesejournalofastronomyandastrophysics,2008,8(5):489.
APA Qian Zheng.(2008).resolvingthemassdiscrepancybetweenstrongandweaklensingmethods.chinesejournalofastronomyandastrophysics,8(5),489.
MLA Qian Zheng."resolvingthemassdiscrepancybetweenstrongandweaklensingmethods".chinesejournalofastronomyandastrophysics 8.5(2008):489.
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