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CAN THE EXCESS IN THE Fe XXVI Ly gamma LINE FROM THE GALACTIC CENTER PROVIDE EVIDENCE FOR 17 keV STERILE NEUTRINOS?
Korea Astron & Space Sci Inst, South Korea.ORCID iD: 0000-0001-6511-4330
Univ Oxford, UK ; Inst Astrophys, France.
2010 (English)In: Astrophysical Journal Letters, ISSN 2041-8205, Vol. 725, no 2, L131-L134 p.Article in journal (Refereed) Published
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.

Place, publisher, year, edition, pages
2010. Vol. 725, no 2, L131-L134 p.
National Category
Astronomy, Astrophysics and Cosmology
Research subject
Physics, Astroparticle Physics
Identifiers
URN: urn:nbn:se:lnu:diva-42855DOI: 10.1088/2041-8205/725/2/L131ISI: 000285051400005OAI: oai:DiVA.org:lnu-42855DiVA: diva2:807490
Available from: 2015-04-23 Created: 2015-04-23 Last updated: 2015-04-23Bibliographically approved

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Prokhorov, Dmitry
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