2019/08/27 by Jian-Yong Cen, Shang-Yu Chien, Chao-Qiang Geng +1
Physics and Astronomy · #Constraint (computer-aided design) #Cosmological model #Cosmology #Cosmology and Gravitation Theories #Dark energy #Dark matter #Energy density #Equation of state #Neutrino #Noncommutative and Quantum Gravity Theories #Particle physics theoretical and experimental studies #f(R) gravity #gr-qc
paper · pdf · doi:10.1016/j.dark.2019.100375
published as Physics of the Dark Universe 26 (2019) 100375 · 15 pages, 8 figures, accepted publication in Physics of the Dark Universe
arxiv created 2019/08/27 · openalex publication_date 2019/08/28 · arxiv updated 2019/09/02 · openalex created_date 2019/09/05 · openalex updated_date 2026/08/05
We concentrate on the cosmological properties in the Tsujikawa model (TM) of viable f ( R ) gravity with the dynamical background evolution and linear perturbation theory by using the CosmoMC package. We study the constraints of the cosmological variables along with the model parameter from the current observational data. In particular, we show that the matter density fluctuation is suppressed and the constraint of the neutrino mass sum is relaxed in the TM, which are similar to other viable f ( R ) models. In addition, we discuss the parameters of the deceleration and equation of state for dark energy in the TM and compare them with those in the Λ CDM model.