2022/02/08 by Inês S. Albuquerque, Noemi Frusciante · 87 citations
Physics and Astronomy · #Anisotropy #Astrophysics #Black Holes and Theoretical Physics #Cosmic background radiation #Cosmic microwave background #Cosmology #Cosmology and Gravitation Theories #Dark energy #Equation of state #Galaxies: Formation, Evolution, Phenomena #Gravitation #Mathematical physics #Particle physics #Physics #Quantum mechanics #astro-ph.CO #gr-qc
paper · pdf · doi:10.1016/j.dark.2022.100980
published in Physics of the Dark Universe 35, 100980 (Elsevier BV) · 14 pages, 12 figures, Accepted for publication in Physics of the Dark Universe
openalex publication_date 2022/02/08 · arxiv created 2022/02/09 · openalex created_date 2022/02/09 · arxiv updated 2022/02/10 · openalex updated_date 2026/08/06
We investigate the evolution of linear perturbations in the Symmetric Teleparallel Gravity, namely f(Q) gravity, for which we design the f(Q) function to match specific expansion histories. We consider different evolutions of the effective dark energy equation of state, wQ(a), which includes wQ=-1, a constant wQ ≠ -1 and a fast varying equation of state. We identify clear patterns in the effective gravitational coupling, which accordingly modifies the linear growth of large scale structures. We provide theoretical predictions for the product of the growth rate f and the root mean square of matter fluctuations σ8, namely fσ8 and for the sign of the cross-correlation power spectrum of the galaxy fluctuations and the cosmic microwave background radiation anisotropies. These properties can be used to distinguish the f(Q) gravity from the standard cosmological model using accurate cosmological observations.