期刊
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
卷 -, 期 12, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1475-7516/2014/12/017
关键词
cosmological perturbation theory; power spectrum; gravity; weak gravitational lensing
资金
- Swiss National Science Foundation
- Marie Curie IEF, Project NeBRiC - Non-linear effects and backreaction in classical and quantum cosmology
We determine the number counts to second order in cosmological perturbation theory in the Poisson gauge and allowing for anisotropic stress. The calculation is performed using an innovative approach based on the recently proposed geodesic light-cone gauge. This allows us to determine the number counts in a purely geometric way, without using Einstein's equation. The result is valid for general dark energy models and (most) modified gravity models. We then evaluate numerically some relevant contributions to the number counts bispectrum. In particular we consider the terms involving the density, redshift space distortion and lensing.
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