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Title: Searching for dark matter annihilation from Milky Way dwarf spheroidal galaxies with six years of Fermi Large Area Telescope data

Abstract

The dwarf spheroidal satellite galaxies (dSphs) of the MilkyWay 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 signi cantly 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.

Authors:
 [1]
  1. Deutsches Elektronen-Synchrotron (DESY), Zeuthen (Germany). et al.
Publication Date:
Research Org.:
Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States); SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP)
Contributing Org.:
Fermi-LAT; The Fermi-LAT Collaboration
OSTI Identifier:
1234886
Alternate Identifier(s):
OSTI ID: 1227524; OSTI ID: 1354855
Report Number(s):
FERMILAB-PUB-15-081-AE
Journal ID: ISSN 0031-9007; PRLTAO; arXiv eprint number arXiv:1503.02641
Grant/Contract Number:  
AC02-07CH11359; FIRB-2012-RBFR12PM1F; AC02-76SF00515
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 115; Journal Issue: 23; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS

Citation Formats

Ackermann, M. Searching for dark matter annihilation from Milky Way dwarf spheroidal galaxies with six years of Fermi Large Area Telescope data. United States: N. p., 2015. Web. doi:10.1103/PhysRevLett.115.231301.
Ackermann, M. Searching for dark matter annihilation from Milky Way dwarf spheroidal galaxies with six years of Fermi Large Area Telescope data. United States. https://doi.org/10.1103/PhysRevLett.115.231301
Ackermann, M. 2015. "Searching for dark matter annihilation from Milky Way dwarf spheroidal galaxies with six years of Fermi Large Area Telescope data". United States. https://doi.org/10.1103/PhysRevLett.115.231301. https://www.osti.gov/servlets/purl/1234886.
@article{osti_1234886,
title = {Searching for dark matter annihilation from Milky Way dwarf spheroidal galaxies with six years of Fermi Large Area Telescope data},
author = {Ackermann, M.},
abstractNote = {The dwarf spheroidal satellite galaxies (dSphs) of the MilkyWay 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 signi cantly 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.},
doi = {10.1103/PhysRevLett.115.231301},
url = {https://www.osti.gov/biblio/1234886}, journal = {Physical Review Letters},
issn = {0031-9007},
number = 23,
volume = 115,
place = {United States},
year = {Mon Nov 30 00:00:00 EST 2015},
month = {Mon Nov 30 00:00:00 EST 2015}
}

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