Galaxy number counts to second order and their bispectrum
Journal Article
·
· Journal of Cosmology and Astroparticle Physics
- Université de Genève, Département de Physique Théorique and CAP, 24 quai Ernest-Ansermet, CH-1211 Genève 4 (Switzerland)
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.
- OSTI ID:
- 22382082
- Journal Information:
- Journal of Cosmology and Astroparticle Physics, Journal Name: Journal of Cosmology and Astroparticle Physics Journal Issue: 12 Vol. 2014; ISSN 1475-7516
- Country of Publication:
- United States
- Language:
- English
Similar Records
The bispectrum of relativistic galaxy number counts
OPTIMAL CAPTURE OF NON-GAUSSIANITY IN WEAK-LENSING SURVEYS: POWER SPECTRUM, BISPECTRUM, AND HALO COUNTS
Observed galaxy number counts on the lightcone up to second order: II. Derivation
Journal Article
·
Thu Dec 31 23:00:00 EST 2015
· Journal of Cosmology and Astroparticle Physics
·
OSTI ID:22525078
OPTIMAL CAPTURE OF NON-GAUSSIANITY IN WEAK-LENSING SURVEYS: POWER SPECTRUM, BISPECTRUM, AND HALO COUNTS
Journal Article
·
Thu Apr 01 00:00:00 EDT 2010
· Astrophysical Journal
·
OSTI ID:21394211
Observed galaxy number counts on the lightcone up to second order: II. Derivation
Journal Article
·
Sat Nov 01 00:00:00 EDT 2014
· Journal of Cosmology and Astroparticle Physics
·
OSTI ID:22375757