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

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

doi:10.1103/physrevlett.115.231301

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

M Ackermann, S Ciprini + Show 123 more

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https://doi.org/10.1103/physrevlett.115.231301

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Journal: Physical Review Letters	Publication Date: Nov 30, 2015
Citations: 846	License type: publisher-specific, author manuscript

Affiliation: Goddard Space Flight Center, National Institute for Nuclear Physics, SLAC National Accelerator Laboratory, University of Padua, George Mason University, University of Montpellier, National Institute for Astrophysics, École Polytechnique, University of California, Irvine, Hiroshima University, Instituto Politécnico Nacional, Stockholm University

#Dwarf Spheroidal Galaxies #Fermi Large Area Telescope Data + Show 8 more

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Abstract

The dwarf spheroidal satellite galaxies (dSphs) of the MilkyWay are some of the most dark matter (DM) dominated objects known. We report on γ-ray observations of MilkyWay dSphs based on six years of Fermi Large Area Telescope data processed with the new Pass8 event-level analysis. None of the dSphs are significantly detected in γ rays, and we present upper limits on the DM annihilation cross section from a combined analysis of 15dSphs. 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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