کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10722488 | 1033774 | 2008 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Constraints on modified Chaplygin gas from recent observations and a comparison of its status with other models
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک هسته ای و انرژی بالا
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
In this Letter, a modified Chaplygin gas (MCG) model of unifying dark energy and dark matter with the exotic equation of state pMCG=BÏMCGâAÏMCGα is constrained from recently observed data: the 182 Gold SNe Ia, the 3-year WMAP and the SDSS baryon acoustic peak. It is shown that the best fit value of the three parameters (B,Bs,α) in MCG model are (â0.085,0.822,1.724). Furthermore, we find the best fit w(z) crosses â1 in the past and the present best fit value w(0)=â1.114<â1, and the 1Ï confidence level of w(0) is â0.946⩽w(0)⩽â1.282. Finally, we find that the MCG model has the smallest Ïmin2 value in all eight given models. According to the Akaike Information Criterion (AIC) of model selection, we conclude that recent observational data support the MCG model as well as other popular models.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physics Letters B - Volume 662, Issue 2, 17 April 2008, Pages 87-91
Journal: Physics Letters B - Volume 662, Issue 2, 17 April 2008, Pages 87-91
نویسندگان
Jianbo Lu, Lixin Xu, Jiechao Li, Baorong Chang, Yuanxing Gui, Hongya Liu,