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CONSTRAINTS ON THE SHAPE OF THE MILKY WAY DARK MATTER HALO FROM THE SAGITTARIUS STREAM [PDF]
Astrophysical Journal Letters, 2013 We propose a new model for the dark matter halo of the Milky Way that fits the properties of the stellar stream associated with the Sagittarius dwarf galaxy. Our dark halo is oblate with q_z = 0.9 for r < 10 kpc, and can be made to follow the Law & Majewski model at larger radii.
Carlos Vera-Ciro
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Analysis methods for Milky Way dark matter halo detection [PDF]
AIP Conference Proceedings, 2007 We present methods for the analysis of dark matter annihilation in the smooth halo of the Milky Way galaxy. We model the diffuse gamma-ray background using GALPROP, and model the halo using an NFW profile and the gamma-ray spectrum for WIMP pair annihilation.
Igor V Moskalenko
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First measurement of the triaxiality of the inner dark matter halo of the Milky Way [PDF]
Astronomy and AstrophysicsContext. Stellar streams are particularly sensitive probes of the mass distribution of galaxies. Aims. In this work, we focus on the Helmi streams (HS), the remnants of an accreted dwarf galaxy orbiting the inner Milky Way. We examined their peculiar dynamical properties in depth, and used these to provide tight constraints on the Galactic potential ...
Hanneke Woudenberg
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Search for dark matter annihilation in the Milky Way halo
Physical Review D, 2018 The Milky Way halo is the brightest source of dark matter annihilation on the sky. Indeed, the potential strength of the Galactic dark matter signal can supersede that expected from dwarf galaxies and galaxy groups even in regions away from the Inner Galaxy.
Laura J Chang +2 more
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How Lumpy Is the Milky Way’s Dark Matter Halo? [PDF]
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?
Kathryn Johnston, David Spergel
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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
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.
Rodrigo Ibata +2 more
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THE SPACE MOTION OF LEO I: THE MASS OF THE MILKY WAY'S DARK MATTER HALO [PDF]
Astrophysical Journal, 2013 We combine our Hubble Space Telescope measurement of the proper motion of the Leo I dwarf spheroidal galaxy (presented in a companion paper) with the highest resolution numerical simulations of Galaxy-size dark matter halos in existence to constrain the mass of the Milky Way's dark matter halo (M_MW).
Roeland van der Marel +2 more
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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
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