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Cosmic shear full nulling: sorting out dynamics, geometry and systematics

Abstract : An explicit full nulling scheme for cosmic shear observations is presented. It makes possible the construction of shear maps from extended source distributions for which the lens distance distribution is restricted to a definite interval. Such a construction allows to build totally independent shear maps, at all scales, that can be taken advantage of to constrain background cosmological parameters and systematics using the full statistical power of cosmic shear observations. Another advantage of such construction is that, as the lens redshift distribution can be made arbitrarily narrow, scale mixing due to projection effects can be limited allowing controlled predictions on the large scale shear power spectrum from perturbation theory calculations.
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Preprints, Working Papers, ...
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https://hal-cea.archives-ouvertes.fr/cea-00979021
Contributor : Emmanuelle de Laborderie <>
Submitted on : Tuesday, April 15, 2014 - 10:55:41 AM
Last modification on : Monday, February 10, 2020 - 6:13:39 PM

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  • HAL Id : cea-00979021, version 1
  • ARXIV : 1312.0430

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Francis Bernardeau, Takahiro Nishimichi, Atsushi Taruya. Cosmic shear full nulling: sorting out dynamics, geometry and systematics. 2013. ⟨cea-00979021⟩

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