Title: | Searching for Dark Matter Annihilation from Milky Way Dwarf Spheroidal Galaxies with Six Years of Fermi Large Area Telescope Data |
Authors: | 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. CARAVEO, PATRIZIA 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 D'AMMANDO, FILIPPO GIROLETTI, MARCELLO ORIENTI, Monica |
Issue Date: | 2015 |
Journal: | PHYSICAL REVIEW LETTERS |
Number: | 115 |
Issue: | 23 |
First Page: | 231301 |
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. |
Acknowledgments: | 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). |
URI: | http://hdl.handle.net/20.500.12386/24859 |
URL: | https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.115.231301 |
ISSN: | 0031-9007 |
DOI: | 10.1103/PhysRevLett.115.231301 |
Bibcode ADS: | 2015PhRvL.115w1301A |
Fulltext: | open |
Appears in Collections: | 1.01 Articoli in rivista
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