Work

The CLASSgal code for relativistic cosmological large scale structure

Year: 2013

Type: article

Abstract: We present accurate and efficient computations of large scale structure observables, obtained with a modified version of the CLASS code which is made publicly available. This code includes all relativistic corrections and computes both the power spectrum C ℓ ( z 1 , z 2 ) and the corresponding correlation function ξ(θ, z 1 , z 2 ) of the matter density and the galaxy number fluctuations in linear perturbation theory. For Gaussian initial perturbations, these quantities contain the full information encoded in the large scale matter distribution at the level of linear perturbation theory. We illustrate the usefulness of our code for cosmological parameter estimation through a few simple examples.

Source: Journal of Cosmology and Astroparticle Physics

DOI: 10.1088/1475-7516/2013/11/044

Authors: Enea Di Dio, Francesco Montanari, Julien Lesgourgues, Ruth Durrer

Institutions: University of Geneva, Centre National de la Recherche Scientifique, Laboratoire d'Annecy de Physique Théorique, École Polytechnique Fédérale de Lausanne, European Organization for Nuclear Research

Language: English

Topic: Cosmology and Gravitation Theories

Subfield: Astronomy and Astrophysics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: bronze

Funders: National Science Foundation, Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung

Awards: G258938352, A genetic analysis of interspecific sterility with Drosophila melanogaster and D. simulans. Dept of genetics, University of Cambridge/GB, G6771358743