Searching for Dark Matter Annihilation from Milky Way Dwarf Spheroidal Galaxies with Six Years of Fermi Large Area Telescope Data

de Angelis, A.; Ackermann, M.; de Palma, F.; Albert, A.; Anderson, B.; Atwood, W.~B B.; Baldini, L.; Barbiellini, G.; Bastieri, D.; Bechtol, K.; Bellazzini, R.; Bissaldi, E.; Blandford, R. D.; Bland ford, R.~D; Bloom, E.~D D.; Bonino, R.; Bottacini, E.; Brandt, T.~J J.; Bregeon, J.; Bruel, P.; Buehler, R.; Caliandro, G.~A A.; Cameron, R.~A A.; Caputo, R.; Caragiulo, M.; Caraveo, P.~A A.; Cecchi, C.; Charles, E.; Chekhtman, A.; Chiang, J.; Chiaro, G.; Ciprini, S.; Claus, R.; Cohen-Tanugi, J.; Conrad, J.; Cuoco, A.; Cutini, S.; D'Ammando, F.; D’Ammando, F.; Desiante, R.; Digel, S.~W W.; Di Venere, L.; Drell, P.~S S.; Drlica-Wagner, A.; Essig, R.; Favuzzi, C.; Fegan, S.~J J.; Ferrara, E.~C C.; Focke, W.~B B.; Franckowiak, A.; Fukazawa, Y.; Funk, S.; Fusco, P.; Gargano, F.; Gasparrini, D.; Giglietto, N.; Giordano, F.; Giroletti, M.; Glanzman, T.; Godfrey, G.; Gomez-Vargas, G.~A A.; Grenier, I.~A A.; Guiriec, S.; Gustafsson, M.; Hays, E.; Hewitt, J.~W W.; Horan, D.; Jogler, T.; Jóhannesson, G.; Kuss, M.; Larsson, S.; Latronico, L.; Li, J.; Li, L.; Garde, M. Llena; Llena Garde, M.; Longo, F.; Loparco, F.; Lubrano, P.; Malyshev, D.; Mayer, M.; Mazziotta, M.~N N.; McEnery, J.~E E.; Meyer, M.; Michelson, P.~F F.; Mizuno, T.; Moiseev, A.~A A.; Monzani, M.~E E.; Morselli, A.; Murgia, S.; Nuss, E.; Ohsugi, T.; Orienti, M.; Orlando, E.; Ormes, J.~F F.; Paneque, D.; Perkins, J.~S S.; Pesce-Rollins, M.; Piron, F.; Pivato, G.; Porter, T.~A A.; Rainò, S.; Rando, R.; Razzano, M.; Reimer, A.; Reimer, O.; Ritz, S.; Sánchez-Conde, M.; Sanchez-Conde, M.; Schulz, A.; Sehgal, N.; Sgrò, C.; Siskind, E.~J J.; Spada, F.; Spandre, G.; Spinelli, P.; Strigari, L.; Tajima, H.; Takahashi, H.; Thayer, J.~B B.; Tibaldo, L.; Torres, D.~F F.; Troja, E.; Vianello, G.; Werner, M.; Winer, B.~L L.; Wood, K.~S S.; Wood, M.; Zaharijas, G.; Zimmer, S.; Collaboration, Fermi-Lat

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American Physical Society, Physical Review Letters, 23(115), 2015

DOI: 10.1103/physrevlett.115.231301

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Searching for Dark Matter Annihilation from Milky Way Dwarf Spheroidal Galaxies with Six Years of Fermi Large Area Telescope Data

Journal article published in 2015 by A. de Angelis, M. Ackermann

, F. de Palma, A. Albert, B. Anderson, W.~B B. Atwood, L. Baldini, G. Barbiellini, D. Bastieri, K. Bechtol, R. Bellazzini, E. Bissaldi, R. D. Blandford, R.~D Bland ford, E.~D D. Bloom and other authors.

This paper is made freely available by the publisher.

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Abstract

The dwarf spheroidal satellite galaxies (dSphs) of the Milky Way are some of the most dark matter (DM) dominated objects known. We report on gamma-ray observations of Milky Way dSphs based on 6 years of Fermi Large Area Telescope data processed with the new Pass 8 event-level analysis. None of the dSphs are significantly detected in gamma rays, and we present upper limits on the DM annihilation cross section from a combined analysis of 15 dSphs. These constraints are among the strongest and most robust to date and lie below the canonical thermal relic cross section for DM of mass <∼ 100 GeV annihilating via quark and τ -lepton channels.

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Searching for Dark Matter Annihilation from Milky Way Dwarf Spheroidal Galaxies with Six Years of Fermi Large Area Telescope Data

Abstract