Cosmological perturbations in massive gravity with doubly coupled matter

被引：50
作者：
Guemruekcueoglu, A. Emir [1 ]
Heisenberg, Lavinia [2 ,3 ,4 ]
Mukohyama, Shinji [5 ,6 ,7 ]
机构：
[1] Univ Nottingham, Sch Math Sci, Nottingham NG7 2RD, England
[2] KTH Royal Inst Technol, NORDITA, S-10691 Stockholm, Sweden
[3] Stockholm Univ, S-10691 Stockholm, Sweden
[4] AlbaNova Univ Ctr, Dept Phys, S-10691 Stockholm, Sweden
[5] AlbaNova Univ Ctr, Oskar Klein Ctr, S-10691 Stockholm, Sweden
[6] Univ Tokyo WPI, Todai Inst Adv Study, Kavli Inst Phys & Math Universe, Kashiwa, Chiba 2778583, Japan
[7] Kyoto Univ, Yukawa Inst Theoret Phys, Kyoto 6068502, Japan
来源：
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2015年 / 02期
基金：
欧洲研究理事会;
关键词：
modified gravity; cosmological perturbation theory; gravity; BORN-INFELD; SUPERNOVAE; BIGRAVITY; CONSTANT; UNIVERSE;
D O I：
10.1088/1475-7516/2015/02/022
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We investigate the cosmological perturbations around FLRW solutions to nonlinear 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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页数：19
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