Results 51 to 60 of about 417,071 (324)
Constraints on dark-matter properties from large-scale structure [PDF]
, 2016 We use large-scale cosmological observations to place constraints on the dark-matter pressure, sound speed and viscosity, and infer a limit on the mass of warm-dark-matter particles.
Kunz, Martin +2 more
core +2 more sources
Cores and cusps in warm dark matter halos [PDF]
Journal of Cosmology and Astroparticle Physics, 2011 The apparent presence of large core radii in Low Surface Brightness galaxies has been claimed as evidence in favor of warm dark matter. Here we show that WDM halos do not have cores that are large fractions of the halo size: typically, r_core/r_200 < 0.001.
Francisco Villaescusa-Navarro +1 more
openaire +3 more sources
Gamma-rays From Warm WIMP Dark Matter Annihilation
, 2012 The weakly interacting massive particle (WIMP) often serves as a candidate for the cold dark matter, however when produced non-thermally it could behave like warm dark matter.
Bi, Xiao-Jun +6 more
core +1 more source
Neutrinos as Hot or Warm Dark Matter [PDF]
, 2011 Both active and sterile sub-eV neutrinos can serve for hot dark matter (DM). On the other hand, keV sterile neutrinos could be a good candidate for warm DM. The beta-decaying (e.g., H-3 and Ru-106) and EC-decaying (e.g., Ho-163) nuclei are considered as the most promising targets to capture those extremely low energy neutrinos and antineutrinos ...
Zhi-zhong Xing, Y.F. Li
openaire +2 more sources
Cosmological implications of a Dark Matter self-interaction energy density
, 2010 We investigate cosmological constraints on an energy density contribution of elastic dark matter self-interactions characterized by the mass of the exchange particle and coupling constant.
C. Boehm +3 more
core +1 more source
, 2008 Caustics are a generic feature of the nonlinear growth of structure in the dark matter distribution. If the dark matter were absolutely cold, its mass density would diverge at caustics, and the integrated annihilation probability would also diverge for ...
Alard +23 more
core +1 more source
Standard model neutrinos as warm dark matter [PDF]
Physical Review D, 2001 5 pages, 5 figures, LaTeX file uses revtex ...
Dmitry V. Semikoz +5 more
openaire +3 more sources
Gravitational waves and dark photon dark matter from axion rotations
Journal of High Energy Physics, 2021 An axion rotating in field space can produce dark photons in the early universe via tachyonic instability. This explosive particle production creates a background of stochastic gravitational waves that may be visible at pulsar timing arrays or other ...
Raymond T. Co +2 more
doaj +1 more source
Imprints of Non-thermal Wino Dark Matter on Small-Scale Structure
, 2012 We study how "warm" the wino dark matter is when it is non-thermally produced by the decays of the gravitino in the early Universe. We clarify the energy distribution of the wino at the decay of the gravitino and the energy loss process after their ...
Ibe, Masahiro +2 more
core +1 more source
Halo Cores and Phase Space Densities: Observational Constraints on Dark Matter Physics and Structure Formation [PDF]
, 2000 We explore observed dynamical trends in a wide range of dark matter dominated systems (about seven orders of magnitude in mass) to constrain hypothetical dark matter candidates and scenarios of structure formation.
Allen S. W. +9 more
core +3 more sources