2008/01/30 by Seokcheon Lee · 11 citations
Physics and Astronomy · #Astronomy #Astrophysics #Black Holes and Theoretical Physics #COSMIC cancer database #Classical mechanics #Cosmological model #Cosmology #Cosmology and Gravitation Theories #Dark energy #Dark matter #Formalism (music) #Galaxies: Formation, Evolution, Phenomena #Horizon #Mathematical physics #Metric (unit) #Physical cosmology #Physics #Quantum gravity #Quantum mechanics #Theoretical physics #astro-ph #f(R) gravity #gr-qc
paper · pdf · doi:10.1142/s021773230802776x
published in Modern Physics Letters A 23(17n20), 1388-1396 (World Scientific) · 10 pages, CosPA 2007 Proceeding will be published in the Mod. Phys. Lett. A
arxiv created 2008/01/30 · openalex publication_date 2008/06/28 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We investigate the modified gravity theories in terms of the effective dark energy models. We compare the cosmic expansion history and the linear growth in different models. We also study the evolution of linear cosmological perturbations in modified theories of gravity assuming the Palatini formalism. We find the stability of the superhorizon metric evolution depends on models. We also study the matter density fluctuation in the general gauge and show the differential equations in super and sub-horizon scales.