Dark matter decay and the temperature of Lyman-alpha clouds

Details Dark matter decay and the temperature of Lyman-alpha clouds Dark matter decay and the temperature of Lyman-alpha clouds

Feb 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...367l..39s&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 367, Feb. 1, 1991, p. L39-L41. Research supported by the Minister

Mathematics

Logic

13

Cosmology, Dark Matter, Lyman Alpha Radiation, Quasars, Hydrogen Ions, Photons, Proximity, Ultraviolet Spectra

Scientific paper

It is shown that if the metagalactic hydrogen-ionizing flux is dominated by the photons emitted by a cosmological distribution of massive neutrinos on a time scale of about 10 to the 23rd s, then a low temperature for 'normal' clouds would actually be expected. A temperature of about 10,000 K for clouds with a redshift of 2.5 or greater is obtained. It is also concluded that the decrease in the number of Lyman-alpha clouds close to a QSO cannot be due to the extra ionizing radiation from the nearby QSO.

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