کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10725281 1034110 2011 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Cosmological consequences of exponential gravity in Palatini formalism
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک هسته ای و انرژی بالا
پیش نمایش صفحه اول مقاله
Cosmological consequences of exponential gravity in Palatini formalism
چکیده انگلیسی
We investigate cosmological consequences of a class of exponential f(R) gravity in the Palatini formalism. By using the current largest type Ia Supernova sample along with determinations of the cosmic expansion at intermediary and high-z we impose tight constraints on the model parameters. Differently from other f(R) models, we find solutions of transient acceleration, in which the large-scale modification of gravity will drive the Universe to a new decelerated era in the future. We also show that a viable cosmological history with the usual matter-dominated era followed by an accelerating phase is predicted for some intervals of model parameters.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physics Letters B - Volume 699, Issue 5, 23 May 2011, Pages 320-324
نویسندگان
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