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Cosmic acceleration and growth of structure in massive gravity

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Cosmic acceleration and growth of structure in massive gravity. / Kenna-Allison, Michael; Gumrukcuoglu, A. Emir; Koyama, Kazuya.

In: Physical Review D - Particles, Fields, Gravitation and Cosmology, Vol. 102, No. 10, 103524, 19.11.2020.

Research output: Contribution to journalArticlepeer-review

Harvard

Kenna-Allison, M, Gumrukcuoglu, AE & Koyama, K 2020, 'Cosmic acceleration and growth of structure in massive gravity', Physical Review D - Particles, Fields, Gravitation and Cosmology, vol. 102, no. 10, 103524. https://doi.org/10.1103/PhysRevD.102.103524

APA

Vancouver

Kenna-Allison M, Gumrukcuoglu AE, Koyama K. Cosmic acceleration and growth of structure in massive gravity. Physical Review D - Particles, Fields, Gravitation and Cosmology. 2020 Nov 19;102(10). 103524. https://doi.org/10.1103/PhysRevD.102.103524

Author

Kenna-Allison, Michael ; Gumrukcuoglu, A. Emir ; Koyama, Kazuya. / Cosmic acceleration and growth of structure in massive gravity. In: Physical Review D - Particles, Fields, Gravitation and Cosmology. 2020 ; Vol. 102, No. 10.

Bibtex

@article{deb81781264a45658835312acca76556,
title = "Cosmic acceleration and growth of structure in massive gravity",
abstract = " We introduce a cosmological model in the framework of Generalised Massive Gravity. This theory is an extension of non-linear massive gravity with a broken translation symmetry in the St{\"u}ckelberg space. In a recent work, we showed the existence of cosmological solutions stable against linear perturbations. In the present paper, we build up on the previous result and study the evolution of the background solutions and the linear perturbations. At the background level, we find that the mass terms act like a fluid with time dependent equation of state w <-1 at late times. At linear order, we derive the Poisson's equation. We find that the scalar graviton mode invokes anisotropic stress, which brings a modification with respect to LCDM in the effective Newton's constant and the growth rate of matter perturbations. Moreover, we study the propagation of gravitational waves and find that the tensor modes acquire a time dependent mass. ",
keywords = "gr-qc, astro-ph.CO, hep-th, RCUK, STFC, ST/S000550/1",
author = "Michael Kenna-Allison and Gumrukcuoglu, {A. Emir} and Kazuya Koyama",
note = "18 pages, 9 figures. No embargo. VoR permitted. Michael Kenna-Allison et al. 'Cosmic Acceleration and Growth of Structure in Massive Gravity.' Phys. Rev. D, Vol(Issue), Article no. {\textcopyright} 20XX American Physical Society. All rights reserved.",
year = "2020",
month = nov,
day = "19",
doi = "10.1103/PhysRevD.102.103524",
language = "English",
volume = "102",
journal = "Physical Review D",
issn = "1550-7998",
publisher = "American Institute of Physics Publising LLC",
number = "10",

}

RIS

TY - JOUR

T1 - Cosmic acceleration and growth of structure in massive gravity

AU - Kenna-Allison, Michael

AU - Gumrukcuoglu, A. Emir

AU - Koyama, Kazuya

N1 - 18 pages, 9 figures. No embargo. VoR permitted. Michael Kenna-Allison et al. 'Cosmic Acceleration and Growth of Structure in Massive Gravity.' Phys. Rev. D, Vol(Issue), Article no. © 20XX American Physical Society. All rights reserved.

PY - 2020/11/19

Y1 - 2020/11/19

N2 - We introduce a cosmological model in the framework of Generalised Massive Gravity. This theory is an extension of non-linear massive gravity with a broken translation symmetry in the Stückelberg space. In a recent work, we showed the existence of cosmological solutions stable against linear perturbations. In the present paper, we build up on the previous result and study the evolution of the background solutions and the linear perturbations. At the background level, we find that the mass terms act like a fluid with time dependent equation of state w <-1 at late times. At linear order, we derive the Poisson's equation. We find that the scalar graviton mode invokes anisotropic stress, which brings a modification with respect to LCDM in the effective Newton's constant and the growth rate of matter perturbations. Moreover, we study the propagation of gravitational waves and find that the tensor modes acquire a time dependent mass.

AB - We introduce a cosmological model in the framework of Generalised Massive Gravity. This theory is an extension of non-linear massive gravity with a broken translation symmetry in the Stückelberg space. In a recent work, we showed the existence of cosmological solutions stable against linear perturbations. In the present paper, we build up on the previous result and study the evolution of the background solutions and the linear perturbations. At the background level, we find that the mass terms act like a fluid with time dependent equation of state w <-1 at late times. At linear order, we derive the Poisson's equation. We find that the scalar graviton mode invokes anisotropic stress, which brings a modification with respect to LCDM in the effective Newton's constant and the growth rate of matter perturbations. Moreover, we study the propagation of gravitational waves and find that the tensor modes acquire a time dependent mass.

KW - gr-qc

KW - astro-ph.CO

KW - hep-th

KW - RCUK

KW - STFC

KW - ST/S000550/1

U2 - 10.1103/PhysRevD.102.103524

DO - 10.1103/PhysRevD.102.103524

M3 - Article

VL - 102

JO - Physical Review D

JF - Physical Review D

SN - 1550-7998

IS - 10

M1 - 103524

ER -

ID: 23050306