کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
974955 | 933009 | 2008 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Parabolic drift towards homogeneity in large-scale structures of galaxies
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
ریاضیات
فیزیک ریاضی
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چکیده انگلیسی
To describe the progressive transition in large-scale structures of galaxies from a seemingly fractal behavior at small scales to a homogeneous distribution at large scales, we use a new geometrical framework called entropic-skins geometry which is based on a diffusion equation of scale entropy through scale space. In the case of an equipartition of scale entropy losses in scale space, it is shown that fractal dimension (varying from 0 to 3) depends linearly on the logarithm of scale from the average size lc of galaxies until a characteristic length scale l0 beyond which distribution becomes homogeneous. A simple parabolic expression for correlation function can be derived: ln(1+ξi)=(β/2)ln2(lo/li) with β=3/ln(l0/lc)â0.32 and l0â55hâ1Mpc. This law has been verified using correlation functions measured on several redshift surveys.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica A: Statistical Mechanics and its Applications - Volume 387, Issue 14, 1 June 2008, Pages 3641-3646
Journal: Physica A: Statistical Mechanics and its Applications - Volume 387, Issue 14, 1 June 2008, Pages 3641-3646
نویسندگان
Diogo Queiros-Conde,