کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10724660 1034031 2013 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Stability analysis and observational measurement in 5-D Brans-Dicke cosmology
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک هسته ای و انرژی بالا
پیش نمایش صفحه اول مقاله
Stability analysis and observational measurement in 5-D Brans-Dicke cosmology
چکیده انگلیسی
This Letter is a study of the effects of higher dimensional gravity and Brans-Dicke (BD) scalar field on cosmic acceleration in 5-D BD cosmological model. We assume a flat cosmological model in which the matter content of the universe is either cold dark matter or radiation. In a framework to study attractor solutions in the phase space we simultaneously constrain the model parameters with the observational data for distance modulus. The phase space analysis illustrates that the universe begins from an unstable state in the past and eventually reaches an asymptotically stable state (attractor). We examine the model by performing Hubble parameter test in addition to statefinder diagnosis. We also reconstruct the equation of state parameter, the scale factor in 3-D space and along extra dimension. The results show that due to the presence of extra dimension and Brans-Dicke scalar field in the model, the universe undergoes a period of acceleration.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physics Letters B - Volume 718, Issue 3, 8 January 2013, Pages 709-717
نویسندگان
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