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Cosmological perturbations in massive gravity with doubly coupled matter

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Published 18 February 2015 • , , Citation A. Emir Gümrükçüoğlu et al JCAP02(2015)022 DOI 10.1088/1475-7516/2015/02/022

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Author affiliations

1 School of Mathematical Sciences, University of Nottingham, University Park, Nottingham, NG7 2RD, U.K.

2 Nordita, KTH Royal Institute of Technology and Stockholm University, Roslagstullsbacken 23, 10691 Stockholm, Sweden

3 Department of Physics & The Oskar Klein Centre, AlbaNova University Centre, 10691 Stockholm, Sweden

4 Kavli Institute for the Physics and Mathematics of the Universe, Todai Institutes for Advanced Study, University of Tokyo (WPI), 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8583, Japan

5 Yukawa Institute for Theoretical Physics, Kyoto University, Kyoto 606-8502, Japan

Dates

  1. Received 6 October 2014
  2. Accepted 29 January 2015
  3. Published

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1475-7516/2015/02/022

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.

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10.1088/1475-7516/2015/02/022