暗物质晕质量函数(Mass function of dark matter halo) 坦特里斯 渔夫 科学求真 赢10 万奖金 · 院士面对面 24 人赞同了该文章 暗物质晕分布的统计性质,即特定红移 z 与质量 M 的暗物质晕的数密度分布 n=n(M,z) ,能够告诉我们结构形成的重要信息。
The dark matter halo mass function (HMF) is a characteristic property of cosmological structure formation models, quantifying the number density of dark matter haloes per unit mass in the Universe. A key goal of current and planned large galaxy surveys is to measure the HMF and to use it to...
We revisit the derivation of the mass function and the bias of dark matter halos for non-Gaussian initial conditions. We use a steepest-descent approach to point out that exact results can be obtained for the high-mass tail of the halo mass function and the two-point correlation of massive...
The early Universe was almost completely smooth and homogeneous. But tiny fluctuations were hidden in the matter distribution, and 20 million years after the Big Bang these began to undergo gravitational collapse. Key to what happened next is the nature
dark mattergalaxies: clusters: generalgalaxies: halosIn the standard excursion-set model for the growth of structure, the statistical properties of halos are governed by the halo mass and are independent of the larger-scale environment in which the halos reside. Numerical simulations, however, have...
[409] to the mass range from 10−18M⊙ to 1015M⊙; this even includes stupendously large black holes (SLABs) larger than 1012M⊙ [211]. Recently, Ginés et al. [410] used the same dark matter halo profile as Ref. [409] and their extended analysis of annihilation signals found ...
Dark matter subhalos are fragile systems that are rapidly and efficiently destroyed below the resolution limit of the simulation [35,36]. Depending on the mass resolution of the simulation used (and to some extent also on the subhalo identification algorithm employed), subhalos can “disappear” ...
Studies of galaxy surveys in the context of the cold dark matter paradigm have shown that the mass of the dark matter halo and the total stellar mass are coupled through a function that varies smoothly with mass. Their average ratio Mhalo/Mstars has a minimum of about 30 for galaxies with...
and sigma_mbh is the random scatter in the log10 of observed SMBH mass around the intrinsic value. Typically, 0.5 dex is adopted for virial estimates. mf_cache is a file containing cached halo mass functions (HMFs) that are pre-calculated based on dark matter N-body simulations. We also...
We find that the number of subhalos scales with the circular velocity of the host halo as V , and that subhalos have nearly the same radial distribution as dark matter particles at radii 0.3-2 times the host halo virial radius. The subhalo velocity function N(> V ) scales as V . ...