مشخصات پژوهش

صفحه نخست /POLYTROPIC AND CHAPLYGIN ...
عنوان POLYTROPIC AND CHAPLYGIN f(R)-GRAVITY MODELS
نوع پژوهش مقاله چاپ‌شده در مجلات علمی
کلیدواژه‌ها Modified theories of gravity; dark energy.
چکیده We reconstruct different f(R)-gravity models corresponding to the polytropic, standard Chaplygin, generalized Chaplygin, modified Chaplygin and modified variable Chaplygin gas dark energy (DE) models. We also obtain the equation of state (EoS) parameters of the corresponding f(R)-gravity models which describe the accelerated expansion of the universe. We conclude that although the EoS parameters of the obtained f(R)-gravities can behave like phantom or quintessence DE models, they cannot justify the transition from the quintessence state to the phantom regime. Furthermore, the polytropic and Chaplygin f(R)-gravity models in de Sitter space can satisfy the inflation condition.
پژوهشگران محمد سعید خالدیان (نفر دوم)، کیومرث کرمی (نفر اول)