The non-linear correlation function and density profiles of virialized haloes
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چکیده
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on the effect of linear & non-linear texts on students comprehension and recalling
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15 صفحه اولThe non-linear correlation function and the shapes of virialized halos
The correlation function ξ(r) of matter in the non-linear regime is assumed to be determined by the density profiles ρ(r) and the mass distribution n(M) of virialized halos. The Press–Schechter approach is used to compute n(M), and the stable clustering hypothesis is used to determine the density profiles of these Press–Schechter halos. Thus, the shape and amplitude of ξ(r) on small scales is r...
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Virial mass is used as an estimator for the mass of a dark matter halo. However, the commonly used constant overdensity criterion does not reflect the dynamical structure of haloes. Here we analyze dark matter cosmological simulations in order to obtain properties of haloes of different masses focusing on the size of the region with zero mean radial velocity. Dark matter inside this region is s...
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The correlation function (r) of matter in the non-linear regime is assumed to be determined by the density prooles (r) and the mass distribution n(M) of virialized halos. The Press{Schechter approach is used to compute n(M), and the stable clustering hypothesis is used to determine the density prooles of these Press{Schechter halos. Thus, the shape and amplitude of (r) on small scales is relate...
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We use numerical simulations in a ΛCDM cosmology to model density profiles in a set of sixteen dark matter haloes with resolutions of up to seven million particles within the virial radius. These simulations allow us to follow robustly the formation and evolution of the central cusp over a large mass range of 10 to 10 M⊙, down to approximately 0.5% of the virial radius, and from redshift 5 to t...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 1997
ISSN: 0035-8711,1365-2966
DOI: 10.1093/mnras/285.2.231