Results 11 to 20 of about 113,784 (303)
Scale Lengths in Dark Matter Halos [PDF]
The Astrophysical Journal, 2005 We investigate a hypothesis regarding the origin of the scalelength in halos formed in cosmological N-body simulations. This hypothesis can be viewed as an extension of an earlier idea put forth by Merritt and Aguilar. Our findings suggest that a phenomenon related to the radial orbit instability is present in such halos and is responsible for density ...
Barnes, E. I. +3 more
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Fuzzy Dark Matter and Dark Matter Halo Cores [PDF]
The Astrophysical Journal, 2020 Abstract Whereas cold dark matter (CDM) simulations predict central dark matter cusps with densities that diverge as ρ(r) ∼ 1/r, observations often indicate constant-density cores with finite central densities ρ 0 and a flat density distribution within a core radius r 0.
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Universal Properties of Dark Matter Halos [PDF]
Physical Review Letters, 2010 4 pages, 1 figure, revtex. Final version to appear in Phys.
Boyarsky A. +3 more
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Hierarchy in the Phase Space and Dark Matter Astronomy [PDF]
, 2009 We develop a theoretical framework for describing the hierarchical structure of the phase space of cold dark matter haloes, due to gravitationally bound substructures.
B. Jain +4 more
core +2 more sources
Properties of dark matter haloes [PDF]
New Astronomy Reviews, 2002 An overview is presented of the main properties of dark matter haloes, as we know them from observations, essentially from rotation curves around spiral and dwarf galaxies. Detailed rotation curves are now known for more than a thousand galaxies, revealing that they are not so flat in the outer parts, but rising for late-types, and falling for early ...
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Halo cold dark matter and microlensing [PDF]
Physical Review Letters, 1994 There is good evidence that most of the baryons in the Universe are dark and some evidence that most of the matter in the Universe is nonbaryonic with cold dark matter (cdm) being a promising possibility. We discuss expectations for the abundance of baryons and cdm in the halo of our galaxy and locally.
Gates, Evalyn, Turner, Michael S.
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Gravothermal Solutions of SIDM Halos: Mapping from Constant to Velocity-dependent Cross Section
The Astrophysical Journal, 2023 The scale-free gravothermal fluid formalism has long proved effective in describing the evolution of self-interacting dark matter halos with a constant dark matter particle cross section.
Shengqi Yang +6 more
doaj +1 more source
Spin Alignment of Dark Matter Halos: Fast Halos [PDF]
The Astrophysical Journal, 2022 Abstract We investigate the spin alignment of dark matter halos by considering a mechanism somewhat similar to tidal locking; we dub it tidal-locking theory (TLT). While tidal torque theory (TTT) is responsible for the initial angular momentum of dark matter halos, TLT explains the angular momentum evolution during nonlinear ages.
Ehsan Ebrahimian, Aliakbar Abolhasani
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Substructure Boosts to Dark Matter Annihilation from Sommerfeld Enhancement [PDF]
, 2009 The recently introduced Sommerfeld enhancement of the dark matter annihilation cross section has important implications for the detection of dark matter annihilation in subhalos in the Galactic halo.
F. A. Aharonian +11 more
core +2 more sources
WEIGHING THE DARK MATTER HALO [PDF]
The Identification of Dark Matter, 2005 6 pages, 2 figures. To appear in "IDM2004: The 5th International Workshop on the Identification of Dark Matter", eds. N.
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