Cosmological tensor perturbations in theories beyond ΛCDM | Zendy

Mohamed Abdelwahab | Zendy; Álvaro de la Cruz-Dombriz | Zendy; Peter K. S. Dunsby | Zendy

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Cosmological tensor perturbations in theories beyond ΛCDM

Author(s) -

Mohamed Abdelwahab,

Álvaro de la Cruz-Dombriz,

Peter K. S. Dunsby

Publication year - 2013

Publication title -

aip conference proceedings

Language(s) - English

Resource type - Conference proceedings

SCImago Journal Rank - 0.177

H-Index - 75

eISSN - 1551-7616

pISSN - 0094-243X

DOI - 10.1063/1.4791747

Subject(s) - physics , cosmic microwave background , gravitational wave , general relativity , tensor (intrinsic definition) , cosmic background radiation , cosmology , theoretical physics , gravitation , cosmological perturbation theory , polarization (electrochemistry) , cosmic cancer database , anisotropy , classical mechanics , astrophysics , quantum mechanics , mathematics , chemistry , pure mathematics

We study for the first time a complete analysis of the imprint of tensor anisotropies on the Cosmic Microwave Background for a class of f(R) gravity theories within the CAMB-PPF framework. Herein we present the most relevant equations, both for the cosmological background and gravitational wave perturbations, taking care to include all effects which arise from f(R) modifications. We find that that the dominant contribution to deviations from General Relativity in the temperature and polarization spectra can be attributed to modifications in the background. This demonstrates the importance of using the correct background in perturbative studies of f(R) gravity

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