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 22 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。
DARK matterGALACTIC halosRANDOM walksGRAVITATIONAL potentialRHEOLOGYDENSITYHalo abundance and structure play a central role for modeling structure formation and evolution. Without relying on a spherical or ellipsoidal collapse model, we analytically derive the halo mass function and cuspy halo density (inner...
we analytically derive the halo mass function and cuspy halo density (inner slope of −4/3) based on the mass and energy cascade theory in dark matter flow. The hierarchical halo structure formation leads to halo or particle
We find that halo density profiles are universal over the entire mass range and are well described by simple two-parameter fitting formulae4,5. Halo mass and concentration are tightly related in a way that depends on cosmology and on the nature of the dark matter. For a fixed mass, the ...
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...
Using measurements of the halo mass-concentration relation and galaxy-cluster mass function to constrain the lifetime--kick-velocity parameter space for decaying dark matter, we find roughly that the observations rule out the combination of kick velocities greater than 100 km/s and decay times less...
However, the halo mass function and progenitor mass functions differ significantly, with the warm dark matter cases being strongly suppressed below the free-streaming scale of the dark matter. We demonstrate the importance of using the correct solution for the excursion set barrier first-crossing ...
N-body+smoothed particle hydrodynamics (SPH) simulations are used to study the evolution of dwarf irregular galaxies (dIrr's) entering the dark matter halo... L Mayer,F Governato,M Colpi,... - 《Astrophysical Journal》 被引量: 184发表: 2000年 Surface brightness and color distributions of ...
We determine the mass function in the concordance Lambda CDM cosmology, as well as its uncertainty, using sixteen 1024(3) particle nested-volume dark matter simulations spanning a mass range of over 5 orders of magnitude. Using the nested volumes and single-halo tests, we find and correct for...
We show that for a range of CDM cosmologies and for a suitable halo definition, the simulated mass function is almost independent of epoch, of cosmological parameters and of the initial power spectrum when expressed in appropriate variables. This universality is of exactly the kind predicted by ...