Simulated Milky Way analogues: implications for dark matter indirect searches

Journal Article · Tue Dec 01 04:00:00 EST 2015 · Journal of Cosmology and Astroparticle Physics

DOI:https://doi.org/10.1088/1475-7516/2015/12/053· OSTI ID:22525100

Calore, Francesca; Bozorgnia, Nassim; Lovell, Mark; Bertone, Gianfranco ^[1]; Schaller, Matthieu; Frenk, Carlos S.; Theuns, Tom; Trayford, James W. ^[2]; Crain, Robert A. ^[3]; Schaye, Joop ^[4]

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1. GRAPPA, University of Amsterdam, Science Park 904, 1090 GL Amsterdam (Netherlands)
2. Institute for Computational Cosmology, Durham University, South Road, Durham DH1 3LE (United Kingdom)
3. Astrophysics Research Institute, Liverpool John Moores University, 146 Brownlow Hill, Liverpool L3 5RF (United Kingdom)
4. Leiden Observatory, Leiden University, PO Box 9513, NL-2300 RA Leiden (Netherlands)

We study high-resolution hydrodynamic simulations of Milky Way type galaxies obtained within the 'Evolution and Assembly of GaLaxies and their Environments' (EAGLE) project, and identify those that best satisfy observational constraints on the Milky Way total stellar mass, rotation curve, and galaxy shape. Contrary to mock galaxies selected on the basis of their total virial mass, the Milky Way analogues so identified consistently exhibit very similar dark matter profiles inside the solar circle, therefore enabling more accurate predictions for indirect dark matter searches. We find in particular that high resolution simulated haloes satisfying observational constraints exhibit, within the inner few kiloparsecs, dark matter profiles shallower than those required to explain the so-called Fermi GeV excess via dark matter annihilation.

• OSTI ID: 22525100
• Journal Information: Journal of Cosmology and Astroparticle Physics, Journal Name: Journal of Cosmology and Astroparticle Physics Journal Issue: 12 Vol. 2015; ISSN 1475-7516
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
ANNIHILATION
COMPUTERIZED SIMULATION
DIAGRAMS
GALACTIC EVOLUTION
GEV RANGE
HYDRODYNAMICS
LIMITING VALUES
MASS
MILKY WAY
NONLUMINOUS MATTER
RESOLUTION
ROTATION