Search with EGRET for a gamma ray line from the Galactic center

Anthony R. Pullen, Ranga Ram Chary, Marc Kamionkowski

    Research output: Contribution to journalArticle

    Abstract

    We search data from the Energetic Gamma Ray Experiment Telescope (EGRET) for a gamma-ray line in the energy range 0.1-10 GeV from the 10°×10° region around the Galactic center. Our null results lead to upper limits to the line flux from the Galactic center. Such lines may have appeared if the dark matter in the Galactic halo is composed of weakly interacting massive particles (WIMPs) in the mass range 0.1-10 GeV. For a given dark-matter-halo model, our null search translates to upper limits to the WIMP two-photon annihilation cross section as a function of WIMP mass. We show that, for a toy model in which Majorana WIMPs in this mass range annihilate only to electron-positron pairs, these upper limits supersede those derived from measurements of the 511-keV line and continuum photons from internal bremsstrahlung at the Galactic center.

    Original languageEnglish (US)
    Article number063006
    JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
    Volume76
    Issue number6
    DOIs
    StatePublished - Sep 17 2007

    Fingerprint

    weakly interacting massive particles
    Gamma Rays
    Telescope
    gamma rays
    telescopes
    Line
    Dark Matter
    Experiment
    Null
    dark matter
    Photon
    Range of data
    electron-positron pairs
    galactic halos
    particle mass
    photons
    Annihilation
    bremsstrahlung
    halos
    Continuum

    ASJC Scopus subject areas

    • Physics and Astronomy(all)
    • Nuclear and High Energy Physics
    • Mathematical Physics

    Cite this

    Search with EGRET for a gamma ray line from the Galactic center. / Pullen, Anthony R.; Chary, Ranga Ram; Kamionkowski, Marc.

    In: Physical Review D - Particles, Fields, Gravitation and Cosmology, Vol. 76, No. 6, 063006, 17.09.2007.

    Research output: Contribution to journalArticle

    Pullen, Anthony R. ; Chary, Ranga Ram ; Kamionkowski, Marc. / Search with EGRET for a gamma ray line from the Galactic center. In: Physical Review D - Particles, Fields, Gravitation and Cosmology. 2007 ; Vol. 76, No. 6.
    @article{722e94c4ef3e45768c5f12f44e14480f,
    title = "Search with EGRET for a gamma ray line from the Galactic center",
    abstract = "We search data from the Energetic Gamma Ray Experiment Telescope (EGRET) for a gamma-ray line in the energy range 0.1-10 GeV from the 10°×10° region around the Galactic center. Our null results lead to upper limits to the line flux from the Galactic center. Such lines may have appeared if the dark matter in the Galactic halo is composed of weakly interacting massive particles (WIMPs) in the mass range 0.1-10 GeV. For a given dark-matter-halo model, our null search translates to upper limits to the WIMP two-photon annihilation cross section as a function of WIMP mass. We show that, for a toy model in which Majorana WIMPs in this mass range annihilate only to electron-positron pairs, these upper limits supersede those derived from measurements of the 511-keV line and continuum photons from internal bremsstrahlung at the Galactic center.",
    author = "Pullen, {Anthony R.} and Chary, {Ranga Ram} and Marc Kamionkowski",
    year = "2007",
    month = "9",
    day = "17",
    doi = "10.1103/PhysRevD.76.063006",
    language = "English (US)",
    volume = "76",
    journal = "Physical review D: Particles and fields",
    issn = "1550-7998",
    publisher = "American Institute of Physics",
    number = "6",

    }

    TY - JOUR

    T1 - Search with EGRET for a gamma ray line from the Galactic center

    AU - Pullen, Anthony R.

    AU - Chary, Ranga Ram

    AU - Kamionkowski, Marc

    PY - 2007/9/17

    Y1 - 2007/9/17

    N2 - We search data from the Energetic Gamma Ray Experiment Telescope (EGRET) for a gamma-ray line in the energy range 0.1-10 GeV from the 10°×10° region around the Galactic center. Our null results lead to upper limits to the line flux from the Galactic center. Such lines may have appeared if the dark matter in the Galactic halo is composed of weakly interacting massive particles (WIMPs) in the mass range 0.1-10 GeV. For a given dark-matter-halo model, our null search translates to upper limits to the WIMP two-photon annihilation cross section as a function of WIMP mass. We show that, for a toy model in which Majorana WIMPs in this mass range annihilate only to electron-positron pairs, these upper limits supersede those derived from measurements of the 511-keV line and continuum photons from internal bremsstrahlung at the Galactic center.

    AB - We search data from the Energetic Gamma Ray Experiment Telescope (EGRET) for a gamma-ray line in the energy range 0.1-10 GeV from the 10°×10° region around the Galactic center. Our null results lead to upper limits to the line flux from the Galactic center. Such lines may have appeared if the dark matter in the Galactic halo is composed of weakly interacting massive particles (WIMPs) in the mass range 0.1-10 GeV. For a given dark-matter-halo model, our null search translates to upper limits to the WIMP two-photon annihilation cross section as a function of WIMP mass. We show that, for a toy model in which Majorana WIMPs in this mass range annihilate only to electron-positron pairs, these upper limits supersede those derived from measurements of the 511-keV line and continuum photons from internal bremsstrahlung at the Galactic center.

    UR - http://www.scopus.com/inward/record.url?scp=34748866150&partnerID=8YFLogxK

    UR - http://www.scopus.com/inward/citedby.url?scp=34748866150&partnerID=8YFLogxK

    U2 - 10.1103/PhysRevD.76.063006

    DO - 10.1103/PhysRevD.76.063006

    M3 - Article

    VL - 76

    JO - Physical review D: Particles and fields

    JF - Physical review D: Particles and fields

    SN - 1550-7998

    IS - 6

    M1 - 063006

    ER -