2007/01/31 by Malcolm Fairbairn, Sara Rydbeck · 28 citations
Earth and Planetary Sciences · Physics and Astronomy · #Astrophysics #Black Holes and Theoretical Physics #Cosmology #Cosmology and Gravitation Theories #Dark energy #Galaxy #Geometry #Geophysics and Gravity Measurements #Inverse #Mathematical physics #Metric (unit) #Physics #Quantum mechanics #Redshift #Scalar (mathematics) #Scattering #Supernova #Theoretical physics #astro-ph
paper · pdf · doi:10.1088/1475-7516/2007/12/005
published in Journal of Cosmology and Astroparticle Physics 2007(12), 005 (Institute of Physics) · accepted in JCAP, presentation clarified, results and conclusions unchanged
arxiv created 2007/11/29 · openalex publication_date 2007/12/11 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We attempt to fit cosmological data using f ( R ) modified Lagrangians containing inverse powers of the Ricci scalar varied with respect to the metric. While we can fit the supernova data well, we confirm the behaviour at medium to high redshifts reported elsewhere and argue that the easiest way to show that this class of models are inconsistent with the data is by considering the thickness of the last scattering surface. For the best fit parameters to the supernova data, the simplest 1/ R model gives rise to a last scattering surface of thickness Δ z ∼530, inconsistent with observations.