Decaying Sterile Neutrinos as a Heating Source in the Milky Way Center

Details Decaying Sterile Neutrinos as a Heating Source in the Milky Way Center Decaying Sterile Neutrinos as a Heating Source in the Milky Way Center

2008-06-08

arxiv.org/abs/0806.1311v1

Mon.Not.Roy.Astron.Soc.389:297-300,2008

Astronomy and Astrophysics

Astrophysics

Accepted by MNRAS with minor corrections

Scientific paper

10.1111/j.1365-2966.2008.13556.x

Recent Chandra and Newton observations indicate that there are two-temperature components ($T \sim$ 8 keV, 0.8 keV) of the diffuse x-rays emitted from deep inside the center 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 center of Milky Way. This model can account for the two-temperature components naturally as well as the energy needed to maintain the $\sim$ 8 keV temperature in the hot gas. The predicted sterile neutrino mass is between 16-18 keV.

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