Results 11 to 20 of about 113,786 (346)
Dark galactic halos without dark matter [PDF]
EPL (Europhysics Letters), 2015 Using standard Einstein theory, baryonic mass cannot account for observed galactic rotation velocities and gravitational lensing, attributed to galactic dark matter halos.
Nesbet, R. K.
core +3 more sources
Collisional Dark Matter and the Structure of Dark Halos [PDF]
The Astrophysical Journal, 2000 We study how the internal structure of dark halos is affected if Cold Dark Matter particles are assumed to have a large cross-section for elastic collisions. We identify a cluster halo in a large cosmological N-body simulation and resimulate its formation with progressively increasing resolution.
Naoki Yoshida +3 more
openalex +5 more sources
A Cuspy Dark Matter Halo [PDF]
The Astrophysical Journal, 2021 Abstract The cusp–core problem is one of the main challenges of the cold dark matter paradigm on small scales; the density of a dark matter halo is predicted to rise rapidly toward the center as ρ(r) ∝ r α with α between −1 and −1.5, while such a cuspy profile has not been ...
Yong Shi +6 more
openaire +3 more sources
The mass function of dark matter haloes [PDF]
Monthly Notices of the Royal Astronomical Society, 2001 14 pages, 12 figures, Minor changes.
Adrian Jenkins +7 more
openalex +6 more sources
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.
Joachim Stadel +8 more
openaire +7 more sources
Dark Matter Haloes and Subhaloes [PDF]
Galaxies, 2019 The development of methods and algorithms to solve the N-body problem for classical, collisionless, non-relativistic particles has made it possible to follow the growth and evolution of cosmic dark matter structures over most of the universe’s history.
Jesús Zavala, Carlos S. Frenk
openaire +5 more sources
Dark energy and dark matter haloes [PDF]
Monthly Notices of the Royal Astronomical Society, 2005 16 p., 11 fig.; replaced with revised version, accepted for publication in MNRAS; corrected error (w=-1.5 halo mass function now agrees with Jenkins et al.
Andrew R. Zentner +4 more
openaire +3 more sources
Microlensing in dark matter haloes [PDF]
Monthly Notices of the Royal Astronomical Society, 2006 Using eight dark matter haloes extracted from fully-self consistent cosmological N-body simulations, we perform microlensing experiments. A hypothetical observer is placed at a distance of 8.5 kpc from the centre of the halo measuring optical depths, event durations and event rates towards the direction of the Large Magellanic Cloud.
Chris Flynn +4 more
openaire +4 more sources
The Astrophysical Journal, 2022 Abstract M54 is a prototype for a globular cluster embedded in a dark matter halo. Gaia Early Data Release 3 photometry and proper motions separate the old, metal-poor stars from the more metal-rich and younger dwarf galaxy stars. The metal-poor stars dominate the inner 50 pc, with a velocity dispersion profile that declines to a minimum
Raymond G. Carlberg, Carl J. Grillmair
openaire +4 more sources
Baryons shaping dark matter haloes [PDF]
Monthly Notices of the Royal Astronomical Society, 2020 ABSTRACT In this work, we aim at investigating the effects of baryons on the dark matter (DM) haloes structure, focusing on the correlation between the presence and importance of stellar discs and the halo shapes. We study the properties of a subsample of DM haloes from Fenix and eagle cosmological simulations.
M. C. Artale +4 more
openaire +5 more sources