Cosmological perturbations in massive gravity with doubly coupled matter

Emir Gumrukcuoglu; Lavinia Heisenberg; Shinji Mukohyama

doi:10.1088/1475-7516/2015/02/022

Cosmological perturbations in massive gravity with doubly coupled matter

Emir Gumrukcuoglu, Lavinia Heisenberg, Shinji Mukohyama

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Abstract

We investigate the cosmological perturbations around FLRW solutions to non- linear massive gravity with a new effective coupling to matter proposed recently. Unlike the case with minimal matter coupling, all five degrees of freedom in the gravity sector propagate on generic self-accelerating FLRW backgrounds. We study the stability of the cosmological solutions and put constraints on the parameters of the theory by demanding the correct sign for the kinetic terms for scalar, vector and tensor perturbations.

Original language	English
Article number	022
Journal	Journal of Cosmology and Astroparticle Physics
Volume	2015
Issue number	2
DOIs	https://doi.org/10.1088/1475-7516/2015/02/022
Publication status	Published - 18 Feb 2015
Externally published	Yes

Keywords

cosmological perturbation theory
gravity
modified gravity

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10.1088/1475-7516/2015/02/022

Cosmological perturbationsFinal published version, 826 KBLicence: CC BY

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Cosmological perturbations in massive gravity with doubly coupled matter

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