Results 1 to 10 of about 28,520 (293)
The GD-1 Stellar Stream Perturber as a Core-collapsed Self-interacting Dark Matter Halo [PDF]
The Astrophysical Journal LettersThe GD-1 stellar stream exhibits spur and gap structures that may result from a close encounter with a dense substructure. When interpreted as a dark matter subhalo, the perturber is denser than predicted in the standard cold dark matter (CDM) model.
Xingyu Zhang +3 more
doaj +2 more sources
Machine Learning the Dark Matter Halo Mass of Milky Way-Like Systems
The Open Journal of AstrophysicsDespite the Milky Way's proximity to us, our knowledge of its dark matter halo is fairly limited, and there is still considerable uncertainty in its halo mass.
Elaheh Hayati +2 more
doaj +3 more sources
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
How Lumpy Is the Milky Way’s Dark Matter Halo? [PDF]
The Astrophysical Journal, 2002 CDM simulations predict that there are hundreds of lumps of with masses greater than 10e7 solar masses in the Milky Way halo. However, we know of only a dozen dwarf satellites close to this mass. Are these lumps simply lacking in stars or is there a fundamental flaw in our most popular cosmology?
Johnston, Kathryn V. +2 more
openaire +2 more sources
The twisted dark matter halo of the Milky Way [PDF]
Monthly Notices of the Royal Astronomical Society, 2020 ABSTRACT We analyse systems analogous to the Milky Way (MW) in the eagle cosmological hydrodynamics simulation in order to deduce the likely structure of the MW’s dark matter (DM) halo. We identify MW mass haloes in the simulation whose satellite galaxies have similar kinematics and spatial distribution to those of the bright satellites ...
Shi Shao +3 more
openaire +5 more sources
The Stellar Halo of the Galaxy is Tilted and Doubly Broken
The Astronomical Journal, 2022 Modern Galactic surveys have revealed an ancient merger that dominates the stellar halo of our galaxy (Gaia–Sausage–Enceladus, GSE). Using chemical abundances and kinematics from the H3 Survey, we identify 5559 halo stars from this merger in the radial ...
Jiwon Jesse Han +9 more
doaj +1 more source
Endothermic self-interacting dark matter in Milky Way-like dark matter haloes
Monthly Notices of the Royal Astronomical Society, 2023 ABSTRACT Self-interacting dark matter (SIDM) offers the potential to mitigate some of the discrepancies between simulated cold dark matter (CDM) and observed galactic properties. We introduce a physically motivated SIDM model to understand the effects of self interactions on the properties of Milky Way and dwarf galaxy sized haloes. This
Stephanie O’Neil +11 more
openaire +2 more sources
THE MILKY WAY'S DARK MATTER HALO APPEARS TO BE LOPSIDED [PDF]
The Astrophysical Journal, 2009 37 pages, 8 figures, accepted for publication in ...
Saha, Kanak +3 more
openaire +2 more sources
Building an Acceleration Ladder with Tidal Streams and Pulsar Timing
The Astrophysical Journal Letters, 2023 We analyse stellar streams in action-angle coordinates combined with recent local direct acceleration measurements to provide joint constraints on the potential of our galaxy.
Peter Craig +3 more
doaj +1 more source
The Dark Matter halo of the Milky Way, AD 2013 [PDF]
Journal of Cosmology and Astroparticle Physics, 2013 We derive the mass model of the Milky Way (MW) using a cored dark matter (DM) halo profile and recent data. The method used consists in fitting a spherically symmetric model of the Galaxy with a Burkert DM halo profile to available data: MW terminal velocities in the region inside the solar circle, circular velocity as recently estimated from maser ...
Nesti Fabrizio, Salucci, Paolo
openaire +3 more sources