Cluster–galaxy weak lensing
نویسندگان
چکیده
منابع مشابه
Weak Lensing
In the preceding chapters, the effects of lensing were so strong as to leave an unmistakable imprint on a specific source, allowing a detailed treatment. However, only the densest regions of the universe are able to provide such a spectacular lensing effect. To study more representative regions of the universe, we must examine large numbers of sources statistically. This is the domain of weak l...
متن کامل3D weak lensing
I propose an analysis method, based on spin-spherical harmonics and spherical Bessel functions, for large-scale weak lensing surveys which have source distance information through photometric redshifts. I show that the distance information can significantly reduce statistical errors on cosmological parameters; in particular, 3D lensing analysis offers excellent prospects for constraining the eq...
متن کاملWeak lensing and cosmology
Recently, it has been shown that it is possible to reconstruct the projected mass distribution of a cluster from weak lensing provided that both the geometry of the universe and the probability distribution of galaxy redshifts are known; actually, when additional photometric data are taken to be available, the galaxy redshift distribution could be determined jointly with the cluster mass from t...
متن کاملWeak gravitational lensing
We review theory and applications of weak gravitational lensing. After summarising Friedmann}Lemam( tre cosmological models, we present the formalism of gravitational lensing and light propagation in arbitrary space}times. We discuss how weak-lensing e!ects can be measured. The formalism is then applied to reconstructions of galaxy-cluster mass distributions, gravitational lensing by large-scal...
متن کاملWeak Lensing and Cosmology
We explore the dependence of weak lensing phenomena on the background cosmology. We rst generalise the relation between P (!), the angular power spectrum of the distortion, and the power spectrum of density uctuations to nonat cosmologies. We then compute P for various illustrative models. A useful cosmological discriminator is the growth of P with source redshift which is much stronger in low ...
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ژورنال
عنوان ژورنال: The Astronomy and Astrophysics Review
سال: 2020
ISSN: 0935-4956,1432-0754
DOI: 10.1007/s00159-020-00129-w