On the Particle Mass in the Decaying Dark Matter Hypothesis

Details On the Particle Mass in the Decaying Dark Matter Hypothesis On the Particle Mass in the Decaying Dark Matter Hypothesis

Sep 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990mnras.246..191s&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Vol. 246, NO. 1/SEP1, P. 191, 1990

Astronomy and Astrophysics

Astronomy

21

Scientific paper

It has been suggested (Sciama) that the free electrons responsible for pulsar dispersion may be produced by ionizing photons emitted by decaying dark matter in the Galaxy. This theory would lead to an unacceptably large flux of ionizing photons in intergalactic space unless the dark-matter particles have the rather precise rest mass of 27.7±0.5 eV. We here test this prediction by using the phase-space constraint on the particle distribution function in the Galaxy. Assuming a maximum phase-space density at the Galactic Centre, and the radial distribution function required by our theory, we find m=276±1 eV in good agreement with our predicted value.

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