منابع مشابه
Evolution of Halo-halo Clustering and Bias in a Λcdm Model
We study the evolution of the halo-halo correlation function and bias in a ΛCDM model using very high-resolution N-body simulations with dynamical range of ∼ 32, 000 (force resolution of ≈ 2hkpc and particle mass of ≈ 10hM⊙). The high force and mass resolution allows dark matter (DM) halos to survive in the tidal fields in high-density regions and thus prevents the ambiguities related with the ...
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Models that reproduce the observed high-velocity clouds (HVCs) also predict clouds at lower radial velocities that may easily be confused with Galactic disk (|z| < 1 kpc) gas. We describe the first search for these low-velocity halo clouds (LVHCs) using IRAS data and the initial data from the Galactic Arecibo L-band Feed Array survey in Hi (GALFA-Hi). The technique is based upon the expectation...
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Using the theory describing the evolution of a galaxy halo due to stochastic fluctuations developed in the companion paper, we show that a halo quickly evolves toward the same self-similar profile, independent of its initial profile and concentration. The selfsimilar part of profile takes the form of a double power law with inner and outer exponents taking the values near −1.5 and −3 respective...
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We present the measurements and modelling of the small-to-intermediate scale (∼0.1– 25 h−1 Mpc) projected and three-dimensional redshift-space two-point correlation functions (2PCFs) of local galaxies in the Sloan Digital Sky Survey Data Release 7. We find a clear dependence of galaxy clustering on luminosity in both projected and redshift spaces, generally being stronger for more luminous samp...
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In this paper we use the “Millennium Simulation” to re-examine the mass assembly history of dark matter halos and the age dependence of halo clustering. We use eight different definitions of halo formation times to characterize the different aspects of the assembly history of a dark matter halo. We find that these formation times have different dependence on halo mass. While some formation time...
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ژورنال
عنوان ژورنال: Physical Review D
سال: 2015
ISSN: 1550-7998,1550-2368
DOI: 10.1103/physrevd.92.123525