Stochastic gravitational wave background from cold dark matter halos
نویسندگان
چکیده
منابع مشابه
Stochastic gravitational wave background from cold dark matter halos
The current knowledge of cosmological structure formation suggests that Cold Dark Matter (CDM) halos possess a non-spherical density profile, implying that cosmic structures can be potential sources of gravitational waves via power transfer from scalar perturbations to tensor metric modes in the non-linear regime. By means of a previously developed mathematical formalism and a triaxial collapse...
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We analyse the properties of substructures within dark matter halos (subhalos) using a set of high-resolution numerical simulations of the formation of structure in a ΛCDM Universe. Our simulation set includes 11 high-resolution simulations of massive clusters as well as a region of mean density, allowing us to study the spatial and mass distribution of substructures down to a mass resolution l...
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1. I n t r o d u c t i o n Dark matter halos are often modelled as isothermal potential wells whose depth is usually identified with the velocity dispersion of stars in spheroidal galaxies or with the disk rotation speed in spirals. Since velocity dispersion increases with galaxy luminosity, this implies that more massive halos should surround brighter galaxies, a hypothesis that, however, does...
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The evolution of halos consisting of weakly self-interacting dark matter particles is summarized. The halos initially contain a central density cusp as predicted by cosmological models. Weak self-interaction leads to the formation of an isothermal, low-density core which is in agreement with published data on the rotation curves of dwarf galaxies. However, subsequently, core collapse leads to a...
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We construct two linear filtering techniques based on weak gravitational lensing to constrain the inner slope α of the density profile of dark-matter halos. Both methods combine all available information into an estimate of this single number. Under idealised assumptions, α is constrained to ∼ 15% if the halo concentration c is known, and to < ∼ 30% if not. We argue that the inevitable degenera...
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ژورنال
عنوان ژورنال: Physical Review D
سال: 2006
ISSN: 1550-7998,1550-2368
DOI: 10.1103/physrevd.73.063503