Searching for Dark Matter Annihilation from Milky Way Dwarf Spheroidal Galaxies with Six Years of Fermi Large Area Telescope Data
Journal
Date Issued
2015
Author(s)
Ackermann, M.
•
Albert, A.
•
Anderson, B.
•
Atwood, W. B.
•
Baldini, L.
•
Barbiellini, G.
•
Bastieri, D.
•
Bechtol, K.
•
Bellazzini, R.
•
Bissaldi, E.
•
Blandford, R. D.
•
Bloom, E. D.
•
Bonino, R.
•
Bottacini, E.
•
Brandt, T. J.
•
Bregeon, J.
•
Bruel, P.
•
Buehler, R.
•
Caliandro, G. A.
•
Cameron, R. A.
•
Caputo, R.
•
Caragiulo, M.
•
•
Cecchi, C.
•
Charles, E.
•
Chekhtman, A.
•
Chiang, J.
•
Chiaro, G.
•
Ciprini, S.
•
Claus, R.
•
Cohen-Tanugi, J.
•
Conrad, J.
•
Cuoco, A.
•
Cutini, S.
•
de Angelis, A.
•
de Palma, F.
•
Desiante, R.
•
Digel, S. W.
•
Di Venere, L.
•
Drell, P. S.
•
Drlica-Wagner, A.
•
Essig, R.
•
Favuzzi, C.
•
Fegan, S. J.
•
Ferrara, E. C.
•
Focke, W. B.
•
Franckowiak, A.
•
Fukazawa, Y.
•
Funk, S.
•
Fusco, P.
•
Gargano, F.
•
Gasparrini, D.
•
Giglietto, N.
•
Giordano, F.
•
Glanzman, T.
•
Godfrey, G.
•
Gomez-Vargas, G. A.
•
Grenier, I. A.
•
Guiriec, S.
•
Gustafsson, M.
•
Hays, E.
•
Hewitt, J. W.
•
Horan, D.
•
Jogler, T.
•
Jóhannesson, G.
•
Kuss, M.
•
Larsson, S.
•
Latronico, L.
•
Li, J.
•
Li, L.
•
Llena Garde, M.
•
Longo, F.
•
Loparco, F.
•
Lubrano, P.
•
Malyshev, D.
•
Mayer, M.
•
Mazziotta, M. N.
•
McEnery, J. E.
•
Meyer, M.
•
Michelson, P. F.
•
Mizuno, T.
•
Moiseev, A. A.
•
Monzani, M. E.
•
Morselli, A.
•
Murgia, S.
•
Nuss, E.
•
Ohsugi, T.
•
Orlando, E.
•
Ormes, J. F.
•
Paneque, D.
•
Perkins, J. S.
•
Pesce-Rollins, M.
•
Piron, F.
•
Pivato, G.
•
Porter, T. A.
•
Rainò, S.
•
Rando, R.
•
Razzano, M.
•
Reimer, A.
•
Reimer, O.
•
Ritz, S.
•
Sánchez-Conde, M.
•
Schulz, A.
•
Sehgal, N.
•
Sgrò, C.
•
Siskind, E. J.
•
Spada, F.
•
Spandre, G.
•
Spinelli, P.
•
Strigari, L.
•
Tajima, H.
•
Takahashi, H.
•
Thayer, J. B.
•
Tibaldo, L.
•
Torres, D. F.
•
Troja, E.
•
Vianello, G.
•
Werner, M.
•
Winer, B. L.
•
Wood, K. S.
•
Wood, M.
•
Zaharijas, G.
•
Zimmer, S.
•
Fermi-LAT Collaboration
•
•
•
Description
The Fermi-LAT Collaboration acknowledges support for LAT development, operation, and data analysis from NASA and DOE (United States), CEA/Irfu and IN2P3/CNRS (France), ASI and INFN (Italy), MEXT, KEK, and JAXA (Japan), and the K. A. Wallenberg Foundation, the Swedish Research Council, and the National Space Board (Sweden). Science analysis support in the operations phase from INAF (Italy) and CNES (France) is also gratefully acknowledged. M. R. funded by the Contract No. FIRB-2012-RBFR12PM1F from the Italian Ministry of Education, University and Research (MIUR).
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 γ -ray observations of Milky Way 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 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.
Volume
115
Issue
23
Start page
231301
Issn Identifier
0031-9007
Ads BibCode
2015PhRvL.115w1301A
Rights
open.access
File(s)![Thumbnail Image]()
Loading...
Name
PhysRevLett.115.231301-accepted.pdf
Description
postprint
Size
731.87 KB
Format
Adobe PDF
Checksum (MD5)
dd9e997ed38a218326de1b8066166e2f