Journal Article

Decaying sterile neutrinos as a heating source in the Milky Way centre

M. H. Chan and M.-C. Chu

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 389, issue 1, pages 297-300
Published in print September 2008 | ISSN: 0035-8711
Published online August 2008 | e-ISSN: 1365-2966 | DOI: http://dx.doi.org/10.1111/j.1365-2966.2008.13556.x
Decaying sterile neutrinos as a heating source in the Milky Way centre

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Recent Chandra and XMM–Newton observations indicate that there are two-temperature components (T∼ 8 keV, 0.8 keV) of the diffuse X-rays emitted from deep inside the centre of Milky Way. We show that this can be explained by the existence of sterile neutrinos, which decay to emit photons that can be bound-free absorbed by the isothermal hot-gas particles in the centre of Milky Way. The model can account for a stable configuration of the two-temperature components hot gas naturally as well as the energy needed to maintain the ∼8 keV temperature in the hot gas. The predicted sterile neutrino mass is between 16–18 keV.

Keywords: dark matter

Journal Article.  2684 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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