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In modern models of physical cosmology, a dark matter halo is a basic unit of cosmological structure. It is a hypothetical region that has decoupled from cosmic expansion and contains gravitationally bound matter. [1]
Sep 2, 2020 · Here we report a cosmological simulation of the formation of present-day haloes over the full range of observed halo masses (20 orders of magnitude) when dark matter is assumed to be in the form...
- J. Wang, S. Bose, C. S. Frenk, L. Gao, A. Jenkins, V. Springel, S. D. M. White
- 2020
Halo definition? A Theorist’s Universe (Dark Matter only) The Mass Function. Statistics describing the halo mass distribution in the Universe. n(M): number density of clusters/halos with mass > M in comoving volume element. Evolution of mass function is highly sensitive to cosmology because matter density controls rate at which structure grows.
- 3MB
- 26
Oct 2, 2023 · Halo 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...
- zhijie.xu@pnnl.gov
Dark matter halos—and the galaxies that reside within them—form from small seeds sown by whatever process sets the initial pattern of overdensities and underdensities in all of the components that make up the Universe. The overdensities start out as very small perturbations on top of the smooth density.
Nov 7, 2023 · We present a pedagogical review of the halo model, a flexible framework that can describe the distribution of matter and its tracers on non-linear scales for both conventional and exotic cosmological models.
Jun 4, 2013 · The abundance of dark matter haloes – the halo mass function – plays an important role in cosmology due to its sensitivity to a number of important parameters including the matter density of the universe, Ω m, the Hubble parameter, h, the spectral index of the primordial power spectrum, ns, and the dark energy equation of state (e.g. Haiman, Moh...
