2015/01/31 by Lavinia Heisenberg · 2 citations
Earth and Planetary Sciences · Physics and Astronomy · #Astrophysics #Black Holes and Theoretical Physics #COSMIC cancer database #Classical mechanics #Cosmology #Cosmology and Gravitation Theories #Dark energy #Epoch (astronomy) #Friedmann–Lemaître–Robertson–Walker metric #Geometry #Geophysics and Gravity Measurements #Gravitation #Isotropy #Massive gravity #Mathematical physics #Metric expansion of space #Physics #Quantum mechanics #Scalar (mathematics) #Tensor (intrinsic definition) #Theoretical physics #astro-ph.CO #gr-qc #hep-th
paper · pdf · doi:10.1088/1475-7516/2015/04/010
published as JCAP 1504 (2015) 04, 010 · 17 pages, typos fixed and references added, Journal version
openalex publication_date 2015/04/08 · arxiv created 2015/04/16 · arxiv updated 2015/04/17 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
In this work we study the theory of extended quasidilaton massive gravity together with the presence of matter fields. After discussing the homogeneous and isotropic fully dynamical background equations, which governs the exact expansion history of the universe, we consider small cosmological perturbations around these general FLRW solutions. The stability of tensor, vector and scalar perturbations on top of these general background solutions give rise to slightly different constraints on the parameters of the theory than those obtained in the approximative assumption of the late-time asymptotic form of the expansion history, which does not correspond to our current epoch. This opens up the possibility of stable FLRW solutions to be compared with current data on cosmic expansion with the restricted parameter space based on theoretical ground.