Cosmological weak lensing
نویسندگان
چکیده
منابع مشابه
Weak Lensing: Prospects for Measuring Cosmological Parameters
Weak lensing of galaxies by large-scale structure can potentially measure cosmological quantities as accurately as the cosmic microwave background (CMB). However, the relation between observables and fundamental parameters is more complex and degenerate, especially in the full space of adiabatic cold dark matter models considered here. We introduce a Fisher matrix analysis of the information co...
متن کاملCosmological model differentiation through weak gravitational lensing
We investigate the potential of weak gravitational lensing maps to differentiate between distinct cosmological models, considering cosmic variance due to a limited map extension and the presence of noise. We introduce a measure of the differentiation between two models under a chosen lensing statistics. That enables one to determine in which circumstances (map size and noise level), and for whi...
متن کاملCosmological Constraints from Weak Lensing Surveys
Focusing on the well motivated aperture mass statistics Map, we study the possibility of constraining cosmological parameters using future space based SNAP class weak lensing missions. Using completely analytical results we construct the covariance matrix for estimators based on two-point and three-point statistics. Our approach incorporates an accurate modelling of higher-order statistics to d...
متن کاملCosmological models discrimination with Weak Lensing
Weak gravitational lensing provides a unique method to map directly the dark matter in the Universe. The majority of lensing analyses uses the two-point statistics of the cosmic shear field to constrain the cosmological model yielding degeneracies, such as that between σ8 and Ωm, respectively the r.m.s. of the mass fluctuations at a scale of 8Mpc/h and the matter density parameter both at z = 0...
متن کاملWeak Lensing from Space Iii: Cosmological Parameters
Weak gravitational lensing provides a unique method to directly map the dark matter in the universe and measure cosmological parameters. The current weak lensing surveys are limited by the atmospheric seeing from the ground and by the small field of view of existing space telescopes. These limitations can be circumvented using wide field observations from space, such as those afforded by the fu...
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ژورنال
عنوان ژورنال: Classical and Quantum Gravity
سال: 2002
ISSN: 0264-9381
DOI: 10.1088/0264-9381/19/13/308