f(R) Gravity: From the Pioneer Anomaly to the Cosmic Acceleration

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dc.creatorSaffari, Reza
dc.creatorRahvar, Sohrab
dc.date2007-08-10
dc.date2008-05-28
dc.date.accessioned2026-07-07T11:41:49Z
dc.date.available2026-07-07T11:41:49Z
dc.descriptionWe use metric formalism in $f(R)$ modified gravity to study the dynamics of various systems from the solar system to the cosmological scale. we assume an ansatz for the derivative of action as a function of distance and describe the Pioneer anomaly and the flat rotation curve of the spiral galaxies. Having the asymptotic behavior of action, we propose the action of $f(R) = (R + Λ)(1 + \ln(R/R_c)/(R/R_0 + 2/α))$ where in galactic and solar system scales it can recover our desired form. The vacuum solution of this action also results in a positive late time acceleration for the universe. We fix the parameters of this model, comparing with the Pioneer anomaly, rotation curve of spiral galaxies and Supernova Type Ia gold sample data.
dc.description6 pages, 2 figures
dc.identifierhttps://arxiv.org/abs/0708.1482
dc.identifierhttp://arxiv.org/abs/0708.1482
dc.identifierPhys.Rev.D77:104028,2008
dc.identifierdoi:10.1103/PhysRevD.77.104028
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/200669
dc.subjectAstrophysics
dc.subjectGeneral Relativity and Quantum Cosmology
dc.subjectHigh Energy Physics - Theory
dc.titlef(R) Gravity: From the Pioneer Anomaly to the Cosmic Acceleration
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