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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 · · Phys.Rev.Lett.
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  1. DESY
  2. Stanford U., HEPL; KIPAC, Menlo Park; Stanford U., Phys. Dept.
  3. Stockholm U., OKC
  4. UC, Santa Cruz
  5. INFN, Pisa
  6. INFN, Trieste; Trieste U.
  7. INFN, Padua; Padua U.
  8. Chicago U., KICP
  9. INFN, Bari
  10. INFN, Turin; Turin U.
  11. NASA, Goddard
  12. U. Montpellier 2, LUPM
  13. Ecole Polytechnique
  14. Stanford U., HEPL; KIPAC, Menlo Park; Stanford U., Phys. Dept.; CIFS, Turin
  15. Brera Observ.
  16. INFN, Perugia; Perugia U.
  17. George Washington U.
  18. Padua U.
  19. INFN, Rome2; INFN, Perugia; Rome Observ.
  20. Stockholm U.; Stockholm U., OKC
  21. Stockholm U., OKC; INFN, Turin; Turin U.
  22. INFN, Rome2; Rome Observ.; INFN, Perugia
  23. Bologna Observ.; Bologna U.
  24. INFN, Trieste
  25. INFN, Bari; Naples U.
  26. INFN, Trieste; Udine U.
  27. Bari U.
  28. Fermilab
  29. SUNY, Stony Brook
  30. Bari U.; INFN, Bari
  31. Hiroshima U.
  32. Bologna Observ.
  33. INFN, Rome; Chile U., Catolica
  34. DAPNIA, Saclay
  35. Gottingen U.
  36. Maryland U., Baltimore County; NASA, Goddard
  37. Iceland U.
  38. INFN, Turin
  39. Barcelona, IEEC
  40. Royal Inst. Tech., Stockholm; Stockholm U., OKC
  41. NASA, Goddard; Maryland U.
  42. INFN, Rome
  43. UC, Irvine
  44. Denver U.
  45. Munich, Max Planck Inst.; Stanford U., HEPL; KIPAC, Menlo Park; Stanford U., Phys. Dept.
  46. Innsbruck U.; Stanford U., HEPL; KIPAC, Menlo Park; Stanford U., Phys. Dept.
  47. Stockholm U., OKC; Stockholm U.
  48. Friends Academy, Locust Valley
  49. Texas A-M
  50. Nagoya U., Solar-Terrestrial Environ. Lab.; Stanford U., HEPL; KIPAC, Menlo Park; Stanford U., Phys. Dept.
  51. Barcelona, IEEC; ICREA, Barcelona
  52. Innsbruck U.
  53. Ohio State U., CCAPP
  54. Naval Research Lab, Wash., D.C.
  55. INFN, Trieste; Nova Gorica U.
+ Show Author Affiliations
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.
Research Organization:
Barcelona, IEEC; Bari U.; Bologna Observ.; Bologna U.; Brera Observ.; CIFS, Turin; Chicago U., KICP; Chile U., Catolica; DAPNIA, Saclay; DESY; Denver U.; Ecole Polytechnique; Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States); Friends Academy, Locust Valley; George Washington U.; Gottingen U.; Hiroshima U.; ICREA, Barcelona; INFN, Bari; INFN, Padua; INFN, Perugia; INFN, Pisa; INFN, Rome; INFN, Rome2; INFN, Trieste; INFN, Turin; Iceland U.; Innsbruck U.; Maryland U.; Maryland U., Baltimore County; Munich, Max Planck Inst.; NASA, Goddard; Nagoya U., Solar-Terrestrial Environ. Lab.; Naples U.; Naval Research Lab, Wash., D.C.; Nova Gorica U.; Ohio State U., CCAPP; Padua U.; Perugia U.; Rome Observ.; Royal Inst. Tech., Stockholm; SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States); SUNY, Stony Brook; Stanford U., HEPL; Stanford U., Phys. Dept.; Stockholm U.; Stockholm U., OKC; Texas A-M; Trieste U.; Turin U.; U. Montpellier 2, LUPM; UC, Irvine; UC, Santa Cruz; Udine U.
Sponsoring Organization:
US Department of Energy; USDOE
Contributing Organization:
The Fermi-LAT Collaboration
Grant/Contract Number:
AC02-07CH11359; AC02-76SF00515
OSTI ID:
1234886
Alternate ID(s):
OSTI ID: 1227524
OSTI ID: 1354855
Report Number(s):
FERMILAB-PUB-15-081-AE; oai:inspirehep.net:1351193; arXiv:1503.02641
Journal Information:
Phys.Rev.Lett., Journal Name: Phys.Rev.Lett. Journal Issue: 23 Vol. 115
Country of Publication:
United States
Language:
English

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