0000000000022892

AUTHOR

P. Cerdá

showing 2 related works from this author

Lens Effect and CMB Anisotropies: Deviations from Gaussianity

2003

The CMB sky can be seen as the superimposition of two components, one of them is the temperature distribution in the absence of lensing and the other one is the correction caused by lensing. In the model under consideration, the first of these components is Gaussian, but the second is not. Numerical methods to calculate angular correlations in the lens component are designed and tested. Some of these correlations are estimated. Deviations from Gaussianity are confirmed.

PhysicsGeodesics in general relativityNumerical analysisGaussianmedia_common.quotation_subjectCosmic microwave backgroundAstrophysics::Cosmology and Extragalactic AstrophysicsAstrophysicslaw.inventionLens (optics)symbols.namesakelawSkysymbolsSuperimpositionAnisotropymedia_common
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Lens Effect and CMB Anisotropies: Simulations

2003

Cosmological structures deviate the photons of the Cosmic Microwave Background (CMB). The resulting deviations can be calculated moving photons in the gravitational field of realistic lens distributions obtained from numerical simulations. The main goal of this paper is answering the following question: Which types of numerical simulations are appropriate to study angular CMB deformations caused by lensing?

PhysicsPhotonGeodesics in general relativitybusiness.industryCosmic microwave backgroundAstrophysics::Cosmology and Extragalactic Astrophysicslaw.inventionLens (optics)OpticsGravitational fieldlawLens effectAnisotropybusiness
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