Closing the Window on Warm Dark Matter

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  • 27 June 2001
Abstract
Sterile neutrinos may be one of the best Warm Dark Matter candidates we have today. Both lower and upper bounds on the mass of the sterile neutrino come from astronomical observations. We show that the proper inclusion of the neutrino momentum distribution reduces the allowed region to be 2.6 keV < m < 5 keV. A search for a spectral line with E=m/2 is thus more interesting than ever before.

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