Gamma rays and neutrinos from dark matter annihilation in galaxy clusters

Journal Article · Thu Jul 15 00:00:00 EDT 2010 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.82.023506· OSTI ID:21410095

Qiang, Yuan ^[1]; Pengfei, Yin ^[2]; Xiaojun, Bi ^[1]; Xinmin, Zhang ^[3]; Shouhua, Zhu ^[2]

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1. Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049 (China)
2. Institute of Theoretical Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871 (China)
3. Theoretical Division, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049 (China)

The {gamma}-ray and neutrino emissions from dark matter (DM) annihilation in galaxy clusters are studied. After about one year of operation of Fermi-LAT, several nearby clusters are reported with stringent upper limits of GeV {gamma}-ray emission. We use the Fermi-LAT upper limits of these clusters to constrain the DM model parameters. We find that the DM model distributed with substructures predicted in cold DM scenario is strongly constrained by Fermi-LAT {gamma}-ray data. Especially for the leptonic annihilation scenario which may account for the e{sup {+-}}excesses discovered by PAMELA/Fermi-LAT/HESS, the constraint on the minimum mass of substructures is of the level 10{sup 2}-10{sup 3} M{sub {center_dot},} which is much larger than that expected in the cold DM picture, but is consistent with a warm DM scenario. We further investigate the sensitivity of neutrino detections of the clusters by IceCube. It is found that neutrino detection is much more difficult than {gamma}-rays. Only for very heavy DM ({approx}10 TeV) together with a considerable branching ratio to line neutrinos the neutrino sensitivity is comparable with that of {gamma}-rays.

• OSTI ID: 21410095
• Journal Information: Physical Review. D, Particles Fields, Vol. 82, Issue 2; Other Information: DOI: 10.1103/PhysRevD.82.023506; (c) 2010 The American Physical Society; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANNIHILATION
BRANCHING RATIO
ELECTRON-POSITRON INTERACTIONS
EMISSION
GALAXY CLUSTERS
GAMMA RADIATION
GEV RANGE
MASS
NEUTRINO DETECTION
NEUTRINOS
NONLUMINOUS MATTER
SENSITIVITY
TEV RANGE 01-10
DETECTION
DIMENSIONLESS NUMBERS
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
ENERGY RANGE
FERMIONS
INTERACTIONS
IONIZING RADIATIONS
LEPTON-LEPTON INTERACTIONS
LEPTONS
MASSLESS PARTICLES
MATTER
PARTICLE INTERACTIONS
RADIATION DETECTION
RADIATIONS
TEV RANGE