Results 41 to 50 of about 117,029 (345)
Condensation of Galactic Cold Dark Matter
, 2016 We consider the steady-state regime describing the density profile of a dark matter halo, if dark matter is treated as a Bose-Einstein condensate. We first solve the fluid equation for "canonical" cold dark matter, obtaining a class of density profiles ...
Visinelli, Luca
core +1 more source
Dark matter bars in spinning haloes [PDF]
Monthly Notices of the Royal Astronomical Society, 2019 ABSTRACT We study non-linear response of spinning dark matter (DM) haloes to dynamic and secular evolution of stellar bars in the embedded galactic discs, using high-resolution numerical simulations. For a sequence of haloes with the cosmological spin parameter λ = 0–0.09, and a representative angular momentum distribution, we analyse ...
Angela Collier +2 more
openaire +2 more sources
Dark Matter Halos around Galaxies
, 1997 27 pages, latex, 18 figures. Review to appear in "Dark and Visible Matter in Galaxies". Proceedings of the Sesto DM1996 Conference Eds M. Persic & P. Salucci. ASP Proceedings Conference Series 1997 also available at ftp://galileo.sissa.it/users/ftp/pub/psrot/persucci ...
Salucci, Paolo, Persic M.
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Mapping substructures in dark matter haloes [PDF]
Monthly Notices of the Royal Astronomical Society: Letters, 2005 Abstract We present a detailed study of the real and integrals-of-motion space distributions of a disrupting satellite obtained from a fully self-consistent high-resolution cosmological simulation of a galaxy cluster. The satellite has been re-simulated using various analytical halo potentials, and we find that its debris appears as a ...
Knebe, Alexander +3 more
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Two-component axionic dark matter halos [PDF]
Modern Physics Letters A, 2020 We consider a two-component dark matter halo (DMH) of a galaxy containing ultra-light axions (ULA) of different mass. The DMH is described as a Bose–Einstein condensate (BEC) in its ground state. In the mean-field (MF) limit, we have derived the integro-differential equations for the spherically symmetrical wave functions of the two DMH components. We
Gennady P. Berman +4 more
openaire +3 more sources
A vertically orientated dark matter halo marks a flip of the Galactic disc
Astronomy & AstrophysicsUnveiling the 3D shape of the Milky Way’s dark-matter halo is critical to understanding its formation history. We created an innovative dynamical model that makes minimal assumptions about the internal dynamical structures and accommodates a highly ...
Zhu Ling +7 more
doaj +1 more source
Leptonic new force and cosmic-ray boosted dark matter for the XENON1T excess
Physics Letters B, 2020 The recently reported excess in XENON1T is explained by new leptonic forces, which are free from gauge anomalies. We focus on two scenarios with and without dark matter. In Scenario #1, the gauge boson of gauged lepton number U(1)Le−Lj, j=μ or τ provides
Yongsoo Jho +3 more
doaj +1 more source
A simple analytical model for dark matter halo structure and adiabatic contraction
, 2006 A simple analytical model for describing inner parts of dark matter halo is considered. It is assumed that dark matter density is power-law. The model deals with dark matter distribution function in phase space of adiabatic invariants (radial action and ...
A. V. Gurevich +22 more
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Do globular clusters possess Dark Matter halos? A case study in NGC 2419
, 2012 We use recently published measurements of the kinematics, surface brightness and stellar mass-to-light ratio of the globular cluster NGC 2419 to examine the possibility that this Galactic halo satellite is embedded in a low-mass dark matter halo.
Bellazzini, Michele +5 more
core +1 more source
The graininess of dark matter haloes [PDF]
Monthly Notices of the Royal Astronomical Society, 2009 We use the recently completed one billion particle Via Lactea II LambdaCDM simulation to investigate local properties like density, mean velocity, velocity dispersion, anisotropy, orientation and shape of the velocity dispersion ellipsoid, as well as structure in velocity space of dark matter haloes.
Zemp, M +7 more
openaire +5 more sources