Dark matter annihilation factors in the Milky Way's dwarf spheroidal galaxies

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Title: Dark matter annihilation factors in the Milky Way's dwarf spheroidal galaxies
Authors: Bonnivard, V
Combet, C
Maurin, D
Walker, MG
Geringer-Sameth, A
Item Type: Conference Paper
Abstract: The Milky Way’s dwarf spheroidal (dSph) galaxies are among the best targets for the indirect detection of dark matter (DM) with γ-rays. The expected gamma-ray flux depends on the so-called ‘J-factor’, the integral of the squared DM density along the line-of-sight. Using a large number of simulated dSphs, we have defined an optimized Jeans analysis setup for the reconstruction of the DM density with stellar-kinematic data. Employing this setup, we provide here estimates of astrophysical J-factors for twenty-two Galactic dSphs, including the newly discovered Reticulum II. We finally identify several criteria that may indicate a contamination of a kinematic dataset by interlopers, leading to unreliable J-factors. We find that the kinematic sample of Segue I, one of the closest dSph, might be affected by this issue.
Editors: Fornengo, N
Regis, M
Zechlin, HS
Issue Date: 31-Jan-2016
Date of Acceptance: 7-Sep-2015
URI: http://hdl.handle.net/10044/1/55328
DOI: https://dx.doi.org/10.1088/1742-6596/718/4/042005
ISSN: 1742-6588
Publisher: Institute of Physics (IoP)
Journal / Book Title: Journal of Physics : Conference Series
Volume: 718
Copyright Statement: Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
Conference Name: 14th International Conference on Topics in Astroparticle and Underground Physics (TAUP)
Keywords: Science & Technology
Physical Sciences
Astronomy & Astrophysics
Physics, Particles & Fields
Physics, Mathematical
02 Physical Sciences
09 Engineering
Publication Status: Published
Start Date: 2015-09-07
Finish Date: 2015-09-11
Conference Place: Torino, ITALY
Appears in Collections:Physics
Faculty of Natural Sciences

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