Cosmological aspects of cubic Galileon massive gravity
Abstract
Cubic Galileon massive gravity is a development of de RhamGabadadzeTolley massive gravity theory in which the space of the Stueckelberg field is broken. We consider the cubic Galileon term as a scalar field coupled to the graviton field. We present a detailed study of the cosmological aspects of this theory of gravity. We analyze selfaccelerating solutions of the background equations of motion to explain the accelerated expansion of the Universe. Exploiting the latest Union2 type Ia supernovae (SNIa) dataset, which consists of 557 SNIa, we show that cubic Galileon massive gravity theory is consistent with the observations. We also examine the tensor perturbations within the framework of this model and find an expression for the dispersion relation of gravitational waves and show that it is consistent with the observational results.
 Publication:

Physical Review D
 Pub Date:
 October 2021
 DOI:
 10.1103/PhysRevD.104.083543
 arXiv:
 arXiv:2107.09919
 Bibcode:
 2021PhRvD.104h3543A
 Keywords:

 General Relativity and Quantum Cosmology;
 High Energy Physics  Theory
 EPrint:
 Phys. Rev. D 104, 083543  Published 27 October 2021