Hybrid f(R) theories, local constraints, and cosmic speedup

2013/01/10 by S. Capozziello, Salvatore Capozzıello, T. Harko +10 · 1 citation
Earth and Planetary Sciences · Physics and Astronomy · #Cosmology and Gravitation Theories #FOS: Physical sciences #General Relativity and Quantum Cosmology (gr-qc) #Geophysics and Gravity Measurements #Solar and Space Plasma Dynamics #gr-qc

paper · pdf · doi:10.48550/arxiv.1301.2209

3 pages, no figures, proceedings of 13th Marcel Grossmann Meeting

arxiv created 2013/01/10 · openalex publication_date 2013/01/10 · arxiv updated 2013/01/11 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We present an extension of general relativity in which an f(R) term à la Palatini is added to the usual metric Einstein-Hilbert Lagrangian. Expressing the theory in a dynamically equivalent scalar-tensor form, we show that it can pass the Solar System observational tests even if the scalar field is very light or massless. Applications to cosmology and astrophysics, and some exact solutions are discussed.

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• Dynamic wormhole geometries in hybrid metric-Palatini gravity

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