SEARCH FOR GAMMA-RAY EMISSION FROM DES DWARF SPHEROIDAL GALAXY CANDIDATES WITH FERMI-LAT DATA

By Alex Drlica-Wagner, A. Albert, K. Bechtol, M. Wood, L. Strigari, M. Sánchez-Conde, L. Baldini, R. Essig, J. Cohen-Tanugi, B. Anderson and 114 more. 2015

185 citations recorded by the source corpus.

Due to their proximity, high dark-matter (DM) content, and apparent absence of non-thermal processes, Milky Way dwarf spheroidal satellite galaxies (dSphs) are excellent targets for the indirect detection of DM. Recently, eight new dSph candidates were discovered using the first year of data from the Dark Energy Survey (DES). We searched for gamma-ray emission coincident with the positions of these new objects in six years of Fermi Large Area Telescope data. We found no significant excesses of gamma-ray emission. Under the assumption that the DES candidates are dSphs with DM halo properties similar to the known dSphs, we computed individual and combined limits on the velocity-averaged DM annihilation cross section for these new targets. If the estimated DM content of these dSph candidates is confirmed, they will constrain the annihilation cross section to lie below the thermal relic cross section for DM particles with masses ≲ 20 GeV ?> annihilating via the b b ¯ ?> or τ+τ− channels.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/0d0b3a1adfd6539b29bf2f6d1d470b87f2592b7f

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Citations in the corpus

Farthest Neighbor: The Distant Milky Way Satellite Eridanus II (2016, background): “This value is consistent with the value predicted from a simple distance scaling based on the J-factors of known dwarfs (e.g., Drlica-Wagner et al. 2015b).”
EIGHT ULTRA-FAINT GALAXY CANDIDATES DISCOVERED IN YEAR TWO OF THE DARK ENERGY SURVEY (2015, background): “…association with the Magellanic Clouds (Deason et al. 2015; Yozin & Bekki 2015), and spatial distribution within the Galactic halo (Pawlowski et al. 2015), and have become targets for indirect dark matter searches (Drlica-Wagner et al. 2015; Geringer-Sameth et al. 2015b; Hooper & Linden 2015).”
SEARCHING FOR DARK MATTER ANNIHILATION IN RECENTLY DISCOVERED MILKY WAY SATELLITES WITH FERMI-LAT (2016, methodology): “This sample includes four ambiguous systems: Cetus II, Eridanus III, Kim 2, and Tucana V.”
Dark matter cores all the way down (2015, background): “E-mail: justin.inglis.read@gmail.com for dark matter annihilation or decay (e.g. Lake 1990; Charbonnier et al. 2011; Malyshev et al. 2014; Bonnivard et al. 2015; Drlica-Wagner et al. 2015; Geringer-Sameth et al. 2015).”