skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Constraints on the dark matter annihilation scenario of Fermi 130 GeV gamma-ray line emission by continuous gamma-rays, Milky Way halo, galaxy clusters and dwarf galaxies observations

Abstract

It was recently reported that there may exist monochromatic γ-ray emission at ∼ 130 GeV from the Galactic center in the Fermi Large Area Telescope data, which might be related with dark matter (DM) annihilation. In this work we carry out a comprehensive check of consistency of the results with the DM annihilation scenario, using the 3.7 yrs Fermi observation of the inner Galaxy, Galactic halo, clusters of galaxies and dwarf galaxies. The results found are as follows. 1) Very strong constraints on the DM annihilation into continuous γ-rays from the Galactic center are set, which are as stringent as the 'natural' scale assuming thermal freeze-out of DM. Such limit sets strong constraint on the DM models to explain the line emission. 2) No line emission from the Galactic halo is found in the Fermi data, (and the constraints on line emission is marginally consistent with) the DM annihilation interpretation of the ∼ 130 GeV line emission from the inner Galaxy. 3) No line emission from galaxy clusters and dwarf galaxies is detected, although possible concentration of photons from clusters in 120–140 GeV is revealed. The constraints from clusters and dwarf galaxies are weak and consistent with the DM annihilationmore » scenario to explain the ∼ 130 GeV line emission.« less

Authors:
;  [1]; ; ;  [2]
  1. National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012 (China)
  2. Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049 (China)
Publication Date:
OSTI Identifier:
22279851
Resource Type:
Journal Article
Journal Name:
Journal of Cosmology and Astroparticle Physics
Additional Journal Information:
Journal Volume: 2012; Journal Issue: 11; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1475-7516
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ANNIHILATION; ASTROPHYSICS; CONCENTRATION RATIO; COSMIC PHOTONS; COSMOLOGY; GALAXY CLUSTERS; GAMMA RADIATION; GEV RANGE; LIMITING VALUES; MILKY WAY; MONOCHROMATIC RADIATION; NONLUMINOUS MATTER

Citation Formats

Huang, Xiaoyuan, Chen, Xuelei, Yuan, Qiang, Yin, Peng-Fei, and Bi, Xiao-Jun, E-mail: huangxiaoyuan@gmail.com, E-mail: yuanq@ihep.ac.cn, E-mail: yinpf@ihep.ac.cn, E-mail: bixj@ihep.ac.cu, E-mail: xuelei@cosmology.bao.ac.cn. Constraints on the dark matter annihilation scenario of Fermi 130 GeV gamma-ray line emission by continuous gamma-rays, Milky Way halo, galaxy clusters and dwarf galaxies observations. United States: N. p., 2012. Web. doi:10.1088/1475-7516/2012/11/048.
Huang, Xiaoyuan, Chen, Xuelei, Yuan, Qiang, Yin, Peng-Fei, & Bi, Xiao-Jun, E-mail: huangxiaoyuan@gmail.com, E-mail: yuanq@ihep.ac.cn, E-mail: yinpf@ihep.ac.cn, E-mail: bixj@ihep.ac.cu, E-mail: xuelei@cosmology.bao.ac.cn. Constraints on the dark matter annihilation scenario of Fermi 130 GeV gamma-ray line emission by continuous gamma-rays, Milky Way halo, galaxy clusters and dwarf galaxies observations. United States. doi:10.1088/1475-7516/2012/11/048.
Huang, Xiaoyuan, Chen, Xuelei, Yuan, Qiang, Yin, Peng-Fei, and Bi, Xiao-Jun, E-mail: huangxiaoyuan@gmail.com, E-mail: yuanq@ihep.ac.cn, E-mail: yinpf@ihep.ac.cn, E-mail: bixj@ihep.ac.cu, E-mail: xuelei@cosmology.bao.ac.cn. Thu . "Constraints on the dark matter annihilation scenario of Fermi 130 GeV gamma-ray line emission by continuous gamma-rays, Milky Way halo, galaxy clusters and dwarf galaxies observations". United States. doi:10.1088/1475-7516/2012/11/048.
@article{osti_22279851,
title = {Constraints on the dark matter annihilation scenario of Fermi 130 GeV gamma-ray line emission by continuous gamma-rays, Milky Way halo, galaxy clusters and dwarf galaxies observations},
author = {Huang, Xiaoyuan and Chen, Xuelei and Yuan, Qiang and Yin, Peng-Fei and Bi, Xiao-Jun, E-mail: huangxiaoyuan@gmail.com, E-mail: yuanq@ihep.ac.cn, E-mail: yinpf@ihep.ac.cn, E-mail: bixj@ihep.ac.cu, E-mail: xuelei@cosmology.bao.ac.cn},
abstractNote = {It was recently reported that there may exist monochromatic γ-ray emission at ∼ 130 GeV from the Galactic center in the Fermi Large Area Telescope data, which might be related with dark matter (DM) annihilation. In this work we carry out a comprehensive check of consistency of the results with the DM annihilation scenario, using the 3.7 yrs Fermi observation of the inner Galaxy, Galactic halo, clusters of galaxies and dwarf galaxies. The results found are as follows. 1) Very strong constraints on the DM annihilation into continuous γ-rays from the Galactic center are set, which are as stringent as the 'natural' scale assuming thermal freeze-out of DM. Such limit sets strong constraint on the DM models to explain the line emission. 2) No line emission from the Galactic halo is found in the Fermi data, (and the constraints on line emission is marginally consistent with) the DM annihilation interpretation of the ∼ 130 GeV line emission from the inner Galaxy. 3) No line emission from galaxy clusters and dwarf galaxies is detected, although possible concentration of photons from clusters in 120–140 GeV is revealed. The constraints from clusters and dwarf galaxies are weak and consistent with the DM annihilation scenario to explain the ∼ 130 GeV line emission.},
doi = {10.1088/1475-7516/2012/11/048},
journal = {Journal of Cosmology and Astroparticle Physics},
issn = {1475-7516},
number = 11,
volume = 2012,
place = {United States},
year = {2012},
month = {11}
}