کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
9861250 1528990 2005 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Large-scale inhomogeneities in modified Chaplygin gas cosmologies
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک هسته ای و انرژی بالا
پیش نمایش صفحه اول مقاله
Large-scale inhomogeneities in modified Chaplygin gas cosmologies
چکیده انگلیسی
We extend the homogeneous modified Chaplygin cosmologies to large-scale perturbations by formulating a Zeldovich-like approximation. We show that the model interpolates between an epoch with a soft equation of state and a de Sitter phase, and that in the intermediate regime its matter content is simply the sum of dust and a cosmological constant. We then study how the large-scale inhomogeneities evolve and compare the results with cold dark matter (CDM), ΛCDM and generalized Chaplygin scenarios. We find that unlike that like the latter, our models resemble ΛCDM.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physics Letters B - Volume 615, Issues 3–4, 2 June 2005, Pages 146-152
نویسندگان
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