Results 41 to 50 of about 28,520 (293)
Stellar Bars in Isolated Gas-rich Spiral Galaxies Do Not Slow Down
The Astrophysical Journal, 2023 Elongated bar-like features are ubiquitous in galaxies, occurring at the centers of approximately two-thirds of spiral disks in the nearby Universe. Due to gravitational interactions between the bar and the other components of galaxies, it is expected ...
Angus Beane +8 more
doaj +1 more source
A vertically orientated dark matter halo marks a flip of the Galactic disc
Astronomy & AstrophysicsUnveiling the 3D shape of the Milky Way’s dark-matter halo is critical to understanding its formation history. We created an innovative dynamical model that makes minimal assumptions about the internal dynamical structures and accommodates a highly ...
Zhu Ling +7 more
doaj +1 more source
, 2016 We incorporate Milky Way dark matter halo profile uncertainties, as well as an accounting of diffuse gamma-ray emission uncertainties in dark matter annihilation models for the Galactic Center Extended gamma-ray excess (GCE) detected by the Fermi Gamma ...
Abazajian, Kevork N., Keeley, Ryan E.
core +1 more source
Small scale structures in coupled scalar field dark matter
Physics Letters B, 2014 We investigate structure formation for ultra-light scalar field dark matter coupled to quintessence, in particular the cosmon–bolon system. The linear power spectrum is computed by a numerical solution of the coupled field equations.
J. Beyer, C. Wetterich
doaj +1 more source
Estimating the dark matter halo mass of our Milky Way using dynamical tracers [PDF]
Monthly Notices of the Royal Astronomical Society, 2015 The mass of the dark matter halo of the Milky Way can be estimated by fitting analytical models to the phase-space distribution of dynamical tracers. We test this approach using realistic mock stellar halos constructed from the Aquarius N-body simulations of dark matter halos in the $ $CDM cosmology.
Wang, Wenting +5 more
openaire +4 more sources
Orientations of Dark Matter Halos in FIRE-2 Milky Way–mass Galaxies
The Astrophysical Journal, 2023 Abstract The shape and orientation of dark matter (DM) halos are sensitive to the microphysics of the DM particles, yet in many mass models, the symmetry axes of the Milky Way’s DM halo are often assumed to be aligned with the symmetry axes of the stellar disk. This is well motivated for the inner DM halo, but not for the outer halo.
Jay Baptista +13 more
openaire +2 more sources
Physics Letters B, 2020 We discuss formation of dark matter (DM) mini-halos around primordial black holes (PBHs) and its implication on DM direct detection experiments, including axion searches.
Mark P. Hertzberg +2 more
doaj +1 more source
What the Milky Way's Dwarfs tell us about the Galactic Center extended excess [PDF]
, 2017 The Milky Way's Galactic Center harbors a gamma-ray excess that is a candidate signal of annihilating dark matter. Dwarf galaxies remain predominantly dark in their expected commensurate emission.
Abazajian, Kevork N. +4 more
core +2 more sources
Symphony: Cosmological Zoom-in Simulation Suites over Four Decades of Host Halo Mass
The Astrophysical Journal, 2023 We present Symphony, a compilation of 262 cosmological, cold-dark-matter-only zoom-in simulations spanning four decades of host halo mass, from 10 ^11 –10 ^15 M _⊙ .
Ethan O. Nadler +11 more
doaj +1 more source
Dark matter halo cores and the tidal survival of Milky Way satellites
Monthly Notices of the Royal Astronomical Society, 2022 ABSTRACT The cuspy central density profiles of cold dark matter (CDM) haloes make them highly resilient to disruption by tides. Self-interactions between dark matter particles, or the cycling of baryons, may result in the formation of a constant-density core that would make haloes more susceptible to tidal disruption.
Errani, Raphaël +4 more
openaire +3 more sources