Results 21 to 30 of about 113,784 (303)
Substructures in cold dark matter haloes [PDF]
Monthly Notices of the Royal Astronomical Society, 2004 We analyse the properties of substructures within dark matter halos (subhalos) using a set of high-resolution numerical simulations of the formation of structure in a Lambda-CDM Universe. Our simulation set includes 11 high-resolution simulations of massive clusters as well as a region of mean density, allowing us to study the spatial and mass ...
De Lucia G. +7 more
openaire +6 more sources
Disk Galaxies Are Self-similar: The Universality of the H i-to-Halo Mass Ratio for Isolated Disks
The Astrophysical Journal Letters, 2023 Observed scaling relations in galaxies between baryons and dark matter global properties are key to shed light on the process of galaxy formation and on the nature of dark matter.
Marie Korsaga +9 more
doaj +1 more source
Dark matter and gamma rays from the galactic halo [PDF]
, 2001 The nature of the dark matter in the halo of our Galaxy is still largely unknown. The microlensing events found so far towards the Large Magellanic Cloud suggest that at most about 20% of the halo dark matter is in the form of MACHOs (Massive ...
Jetzer, Philippe
core +3 more sources
Dark matter–radiation interactions: the impact on dark matter haloes [PDF]
Monthly Notices of the Royal Astronomical Society, 2015 Interactions between dark matter (DM) and radiation (photons or neutrinos) in the early Universe suppress density fluctuations on small mass scales. Here we perform a thorough analysis of structure formation in the fully non-linear regime using N-body simulations for models with DM-radiation interactions and compare the results to a traditional ...
Schewtschenko JA +4 more
openaire +4 more sources
Polarized image of a rotating black hole surrounded by a cold dark matter halo
European Physical Journal C: Particles and Fields, 2023 We have studied the polarized image of an equatorial emitting ring around a rotating black hole surrounded by a cold dark matter (CDM) halo. Results show that the CDM halo density has the similar effects of the halo’s characteristic radius on the ...
Xin Qin +3 more
doaj +1 more source
SHAPES OF DARK MATTER HALOS [PDF]
The Shapes of Galaxies and Their Dark Halos, 2002 5 pages, 2 figures, to appear in proceedings of the May 2001 Yale workshop "The Shapes of Galaxies and their Halos"
openaire +2 more sources
Diurnal modulation signal from dissipative hidden sector dark matter
Physics Letters B, 2015 We consider a simple generic dissipative dark matter model: a hidden sector featuring two dark matter particles charged under an unbroken U(1)′ interaction.
R. Foot, S. Vagnozzi
doaj +1 more source
Dark matter and no dark matter: on the halo mass of NGC 1052 [PDF]
Monthly Notices of the Royal Astronomical Society, 2019 ABSTRACT The NGC 1052 group, and in particular the discovery of two ultra-diffuse galaxies with very low internal velocity dispersions, has been the subject of much attention recently. Here we present radial velocities for a sample of 77 globular clusters associated with NGC 1052 obtained on the Keck telescope.
Duncan A Forbes +3 more
openaire +3 more sources
The structure of dark matter halos in an annihilating dark matter model [PDF]
New Astronomy, 2001 The inability of standard non-interacting cold dark matter (CDM) to account for the small scale structure of individual galaxies has led to the suggestion that the dark matter may undergo elastic and/or inelastic scattering. We simulate the evolution of an isolated dark matter halo which undergoes both scattering and annihilation. Annihilations produce
Craig, Matthew W., Davis, Marc
openaire +2 more sources
Collisional Dark Matter and the Structure of Dark Halos
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.
YOSHIDA N +3 more
openaire +3 more sources