کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10724340 1033961 2009 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Constraints on the phase plane of the dark energy equation of state
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک هسته ای و انرژی بالا
پیش نمایش صفحه اول مقاله
Constraints on the phase plane of the dark energy equation of state
چکیده انگلیسی
Classification of dark energy models in the plane of w and w′, where w is the dark energy equation of state and w′ its time-derivative in units of the Hubble time, has been studied in the literature. We take the current SN Ia, CMB and BAO data, invoke a widely used parametrization of the dark energy equation of state, and obtain the constraints on the w-w′ plane. We find that several dark energy models including the cosmological constant, phantom, non-phantom barotropic fluids, and monotonic up-rolling quintessence are ruled out at the 68.3% confidence level based on the current observational data. On the other hand, down-rolling quintessence, including the thawing and the freezing models, is consistent with the current observations. All the above-mentioned models are still consistent with the data at the 95.4% confidence level.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physics Letters B - Volume 682, Issue 3, 7 December 2009, Pages 267-273
نویسندگان
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