Telescope search for a 3-eV to 8-eV axion

Details Telescope search for a 3-eV to 8-eV axion Telescope search for a 3-eV to 8-eV axion

Mar 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991phrvl..66.1398b&link_type=abstract

Physical Review Letters (ISSN 0031-9007), vol. 66, March 18, 1991, p. 1398-1401. Research supported by DOE and NSF.

Mathematics

Logic

40

Astronomical Spectroscopy, Dark Matter, Galactic Clusters, Photons, Telescopes, Astronomical Models, Hubble Constant, Line Spectra, Neutrinos

Scientific paper

Axions of mass 3-8 eV should have a cosmological abundance of about 50/cu cm and reside in rich clusters of galaxies. Their decays to two photons will produce a line at a wavelength of about 3100-8300 A. This effort has searched unsuccessfully for such a feature in the tergalactic light of three rich clusters, closing this 'window', and leaving open only the window from 10 to the -6th to 0.001 eV. This implies that if the axion exists, it likely comprises the dark matter. The present flux limits are of relevance to other relics whose decays produce monoenergetic photons.

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