Decaying neutrinos and the nature of the dark matter in galaxy clusters

Details Decaying neutrinos and the nature of the dark matter in galaxy clusters Decaying neutrinos and the nature of the dark matter in galaxy clusters

Jan 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993pasp..105..102s&link_type=abstract

Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 105, no. 683, p. 102-105.

Astronomy and Astrophysics

Astronomy

12

Dark Matter, Galactic Clusters, Neutrinos, Emission Spectra, Mass Distribution, X Ray Astronomy

Scientific paper

It is widely believed that Sciama's (1990) decaying-neutrino theory has been disproved by the failure of Davidsen et al. (1991) to detect an unidentified emission line at about 15 eV (in the rest frame) from the dark matter in the cluster of galaxies A665 (e.g., Trimble, 1992). Here we show that recent X-ray data for A665 favor models in which the dark matter in the regions of the cluster observed by Davidsen et al. is mainly baryonic. Thus the decaying-neutrino theory continues to be viable.

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