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Title: Revisiting perturbations in extended quasidilaton massive gravity

Abstract

In this work we study the theory of extended quasidilaton massive gravity together with the presence of matter fields. After discussing the homogeneous and isotropic fully dynamical background equations, which governs the exact expansion history of the universe, we consider small cosmological perturbations around these general FLRW solutions. The stability of tensor, vector and scalar perturbations on top of these general background solutions give rise to slightly different constraints on the parameters of the theory than those obtained in the approximative assumption of the late-time asymptotic form of the expansion history, which does not correspond to our current epoch. This opens up the possibility of stable FLRW solutions to be compared with current data on cosmic expansion with the restricted parameter space based on theoretical ground.

Authors:
 [1]
  1. Nordita, KTH Royal Institute of Technology and Stockholm University, Roslagstullsbacken 23, 10691 Stockholm (Sweden)
Publication Date:
OSTI Identifier:
22525908
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Cosmology and Astroparticle Physics; Journal Volume: 2015; Journal Issue: 04; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ASYMPTOTIC SOLUTIONS; COMPARATIVE EVALUATIONS; COSMOLOGICAL MODELS; COSMOLOGY; DISTURBANCES; EXPANSION; FIELD EQUATIONS; GRAVITATION; LIMITING VALUES; SCALARS; SPACE; UNIVERSE; VECTORS

Citation Formats

Heisenberg, Lavinia, E-mail: Lavinia.Heisenberg@kth.se. Revisiting perturbations in extended quasidilaton massive gravity. United States: N. p., 2015. Web. doi:10.1088/1475-7516/2015/04/010.
Heisenberg, Lavinia, E-mail: Lavinia.Heisenberg@kth.se. Revisiting perturbations in extended quasidilaton massive gravity. United States. doi:10.1088/1475-7516/2015/04/010.
Heisenberg, Lavinia, E-mail: Lavinia.Heisenberg@kth.se. Wed . "Revisiting perturbations in extended quasidilaton massive gravity". United States. doi:10.1088/1475-7516/2015/04/010.
@article{osti_22525908,
title = {Revisiting perturbations in extended quasidilaton massive gravity},
author = {Heisenberg, Lavinia, E-mail: Lavinia.Heisenberg@kth.se},
abstractNote = {In this work we study the theory of extended quasidilaton massive gravity together with the presence of matter fields. After discussing the homogeneous and isotropic fully dynamical background equations, which governs the exact expansion history of the universe, we consider small cosmological perturbations around these general FLRW solutions. The stability of tensor, vector and scalar perturbations on top of these general background solutions give rise to slightly different constraints on the parameters of the theory than those obtained in the approximative assumption of the late-time asymptotic form of the expansion history, which does not correspond to our current epoch. This opens up the possibility of stable FLRW solutions to be compared with current data on cosmic expansion with the restricted parameter space based on theoretical ground.},
doi = {10.1088/1475-7516/2015/04/010},
journal = {Journal of Cosmology and Astroparticle Physics},
number = 04,
volume = 2015,
place = {United States},
year = {Wed Apr 01 00:00:00 EDT 2015},
month = {Wed Apr 01 00:00:00 EDT 2015}
}