کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10723290 1033846 2010 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Time variable cosmological constants from the age of universe
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک هسته ای و انرژی بالا
پیش نمایش صفحه اول مقاله
Time variable cosmological constants from the age of universe
چکیده انگلیسی
In this Letter, time variable cosmological constant, dubbed age cosmological constant, is investigated motivated by the fact: any cosmological length scale and time scale can introduce a cosmological constant or vacuum energy density into Einstein's theory. The age cosmological constant takes the form ρΛ=3c2MP2/tΛ2, where tΛ is the age or conformal age of our universe. The effective equation of state (EoS) of age cosmological constant are wΛeff=−1+23ΩΛc and wΛeff=−1+23ΩΛc(1+z) when the age and conformal age of universe are taken as the role of cosmological time scales respectively. The EoS are the same as the so-called agegraphic dark energy models. However, the evolution histories are different from the agegraphic ones for their different evolution equations.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physics Letters B - Volume 690, Issue 4, 28 June 2010, Pages 333-336
نویسندگان
, , ,