Dark Matter distribution in the Milky Way: microlensing and dynamical constraints

2011/07/31 by Fabio Iocco, Miguel Pato, Gianfranco Bertone +1 · 8 citations
Physics and Astronomy · #Astronomy #Astrophysics #Baryon #Baryonic dark matter #Cosmology #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Dark energy #Dark matter #Dark matter halo #Galaxies: Formation, Evolution, Phenomena #Galaxy #Gravitational microlensing #Halo #Milky Way #Physics #Scalar field dark matter #astro-ph.GA #hep-ph

paper · pdf · doi:10.1088/1475-7516/2011/11/029

published as JCAP11(2011)029 · 12 pages, 5 figures, matches published version

openalex publication_date 2011/11/15 · arxiv created 2011/11/17 · arxiv updated 2011/11/18 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

We show that current microlensing and dynamical observations of the Galaxy permit to set interesting constraints on the Dark Matter local density and profile slope towards the galactic centre. Assuming state-of-the-art models for the distribution of baryons in the Galaxy, we find that the most commonly discussed Dark Matter profiles ( viz. Navarro-Frenk-White and Einasto) are consistent with microlensing and dynamical observations, while extreme adiabatically compressed profiles are robustly ruled out. When a baryonic model that also includes a description of the gas is adopted, our analysis provides a determination of the local Dark Matter density, ρ 0 = 0.20−0.56 GeV/cm 3 at 1σ, that is found to be compatible with estimates in the literature based on different techniques.

Citations

• Low Microlensing Optical Depth Toward the Galactic Bar
• Galactic Bulge Microlensing Events with Clump Giants as Sources
• Extracting information about WIMP properties from direct detection experiments: astrophysical uncertainties
• Evidence for gravitational microlensing by dark objects in the Galactic halo
• Baryonic pinching of galactic dark matter halos
• DARK MATTER DYNAMICS AND INDIRECT DETECTION
• TRIGONOMETRIC PARALLAXES OF MASSIVE STAR-FORMING REGIONS. VI. GALACTIC STRUCTURE, FUNDAMENTAL PARAMETERS, AND NONCIRCULAR MOTIONS
• Time-dependent models for dark matter at the galactic center
• The Aquarius Project: the subhaloes of galactic haloes

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• Constraints on galactic wino densities from gamma ray lines
• Measuring the local dark matter density in the laboratory
• Fermi LAT search for internal bremsstrahlung signatures from dark matter annihilation
• The Fermi-LAT gamma-ray excess at the Galactic Center in the singlet-doublet fermion dark matter model
• On the change of old neutron star masses with galactocentric distance
• Constraining dark matter sub-structure with the dynamics of astrophysical systems
• Updated cosmic-ray and radio constraints on light dark matter: Implications for the GeV gamma-ray excess at the Galactic Center