Results 11 to 20 of about 117,029 (345)
Caustics in dark matter haloes [PDF]
EAS Publications Series, 2006 Comment: Minor changes, two references added, 6 pages, 3 figures, to appear in Proc. 21st IAP Colloquium "Mass Profiles and Shapes of Cosmological Structures", Paris 4-9 July 2005, [EAS Publications Series, eds: G. Mamon, F. Combes, C. Deffayet, B. Fort]
R. Mohayaee +5 more
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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.
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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.
Pedro Cataldi +3 more
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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
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Merger rates of dark matter haloes [PDF]
Monthly Notices of the Royal Astronomical Society, 2008 We derive analytic merger rates for dark-matter haloes within the framework of the Extended Press-Schechter (EPS) formalism. These rates become self-consistent within EPS once we realize that the typical merger in the limit of a small time-step involves more than two progenitors, contrary to the assumption of binary mergers adopted in earlier studies ...
Eyal Neistein, Avishai Dekel
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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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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
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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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Dark matter haloes within clusters [PDF]
Monthly Notices of the Royal Astronomical Society, 1998 LaTeX MN style, 20 pages, 30 figures included + 1 colour ...
Ghigna, Sebastiano +5 more
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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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