کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
9827994 1523810 2005 15 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The cyclic model simplified
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم نجوم و فیزیک نجومی
پیش نمایش صفحه اول مقاله
The cyclic model simplified
چکیده انگلیسی
The Cyclic Model attempts to resolve the homogeneity, isotropy, and flatness problems and generate a nearly scale-invariant spectrum of fluctuations during a period of slow contraction that precedes a bounce to an expanding phase. Here we describe at a conceptual level the recent developments that have greatly simplified our understanding of the contraction phase and the Cyclic Model overall. The answers to many past questions and criticisms are now understood. In particular, we show that the contraction phase has equation of state w > 1 and that contraction with w > 1 has a surprisingly similar properties to inflation with w < −1/3. At one stroke, this shows how the model is different from inflation and why it may work just as well as inflation in resolving cosmological problems.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: New Astronomy Reviews - Volume 49, Issues 2–6, May 2005, Pages 43-57
نویسندگان
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