کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
9861100 1528983 2005 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Complementary constraints on non-standard cosmological models from CMB and BBN
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک هسته ای و انرژی بالا
پیش نمایش صفحه اول مقاله
Complementary constraints on non-standard cosmological models from CMB and BBN
چکیده انگلیسی
We study metric-affine gravity (MAG) inspired cosmological models. Those models were statistically estimated using the SNIa data. We also use the cosmic microwave background observations and the big-bang nucleosynthesis analysis to constrain the density parameter Ωψ,0 which is related to the non-Riemannian structure of the underlying spacetime. We argue that while the models are statistically admissible from the SNIa analysis, complementary stricter limits obtained from the CMB and BBN indicate that the models with density parameters with a a−6 scaling behaviour are virtually ruled out. If we assume the validity of the particular MAG based cosmological model throughout all stages of the universe, the parameter estimates from the CMB and BBN put a stronger limit, in comparison to the SNIa data, on the presence of non-Riemannian structures at low redshifts.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physics Letters B - Volume 619, Issues 3–4, 21 July 2005, Pages 219-225
نویسندگان
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