Results 31 to 40 of about 213,451 (373)
Black hole shadow of Sgr A* in dark matter halo [PDF]
Journal of Cosmology and Astroparticle Physics, 2018 We study, for the first time, the shadow of the supermassive black hole Sgr A* at the center of the Milky Way in dark matter halos. For the Cold Dark Matter and Scalar Field Dark Matter models considered in this work, the apparent shapes of the shadow ...
Xian Hou +3 more
semanticscholar +1 more source
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
Is the dark-matter halo spin a predictor of galaxy spin and size? [PDF]
Monthly notices of the Royal Astronomical Society, 2018 The similarity between the distributions of spins for galaxies (λgal) and for dark-matter haloes (λhalo), indicated both by simulations and observations, is naively interpreted as a one-to-one correlation between the spins of a galaxy and its host halo.
F. Jiang +10 more
semanticscholar +1 more source
Astrophysical Journal, 2022 In this article, we find the possibility of generalized wormhole formation in the galactic halo due to dark matter using observational data within the matter coupling gravity formalism.
G. Mustafa, S. K. Maurya, Saibal Ray
semanticscholar +1 more source
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 ...
Arif Babul +5 more
openaire +3 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
Relaxation in a Fuzzy Dark Matter Halo [PDF]
Astrophysical Journal, 2018 Dark matter may be composed of light bosons, , with a de Broglie wavelength in typical galactic potentials. Such “fuzzy” dark matter (fuzzy dark matter (FDM)) behaves like cold dark matter (CDM) on much larger scales than the de Broglie wavelength, but ...
Ben Bar-Or +2 more
semanticscholar +1 more source
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
Dark matter halo shapes in the Auriga simulations [PDF]
Monthly notices of the Royal Astronomical Society, 2019 We present shape measurements of Milky Way–sized dark matter haloes at redshift z = 0 in a suite of 30 zoom simulations from the Auriga project. We compare the results in full magnetohydrodynamics against dark matter–only simulations and find a strong ...
J. Prada +4 more
semanticscholar +1 more source
Non-universality of halo profiles and implications for dark matter experiments [PDF]
, 2011 We explore the cosmological halo-to-halo scatter of the distribution of mass within dark matter halos utilizing a well-resolved statistical sample of clusters from the cosmological Millennium simulation.
Bergstrom +51 more
core +1 more source