Abstract
view Abstract Citations (17) References (18) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Dark Matter Decay and the Temperature of Lyman-Alpha Clouds Sciama, D. W. Abstract The recent discovery by Pettini et al. that Lyman-α clouds have low temperatures led them to derive an implausibly extreme model for the clouds. We here point out that a normal model could be retained if most of the photons ionizing the hydrogen in the cloud have an energy only a few percent greater than the ionization potential of hydrogen. Precisely this situation holds for the photons occurring in our decaying dark matter hypothesis, which would also account for the intensity of the required photon flux. This explanation implies that the proximity effect is not due to excess radiation from the nearby QSO. The significance of this conclusion is discussed. Publication: The Astrophysical Journal Pub Date: February 1991 DOI: 10.1086/185927 Bibcode: 1991ApJ...367L..39S Keywords: Cosmology; Dark Matter; Lyman Alpha Radiation; Quasars; Hydrogen Ions; Photons; Proximity; Ultraviolet Spectra; Astrophysics; COSMOLOGY; QUASARS; ULTRAVIOLET: SPECTRA full text sources ADS | data products SIMBAD (1)
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