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  • 51.
    Prokhorov, Dmitry
    et al.
    Korea Astron & Space Sci Inst, South Korea.
    Silk, Joseph
    Univ Oxford, UK ; Inst Astrophys, France.
    CAN THE EXCESS IN THE Fe XXVI Ly gamma LINE FROM THE GALACTIC CENTER PROVIDE EVIDENCE FOR 17 keV STERILE NEUTRINOS?2010In: Astrophysical Journal Letters, ISSN 2041-8205, E-ISSN 2041-8213, Vol. 725, no 2, p. L131-L134Article in journal (Refereed)
    Abstract [en]

    Sterile neutrinos (or right-handed neutrinos) are a plausible warm dark matter candidate. We find that the excess of the intensity in the 8.7 keV line (at the energy of the Fe XXVI Ly gamma line) in the spectrum of the Galactic center observed by Suzaku cannot be explained by standard ionization and recombination processes. We suggest that the origin of this excess is via decays of sterile neutrinos with a mass of 17.4 keV. The estimated value of the mixing angle sin(2)(2 theta) = (4.4 +/- 2.2) x 10(-12) lies in the allowed region of the mixing angle for a dark matter sterile neutrino with a mass of 17-18 keV.

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