Abstract
The accretion of matter onto stars formed by carbon-oxygen cores triggers hydrogen flicker. The development of hydrogen flicker and the shock generation associated therewith are discussed. If the matter thus ejected is halted by a dense gas surrounding a star, a corona of high temperature is formed. This may take place in dense planetary nebulae and is regarded as an origin of starlike X-ray sources. More violent hydrogen flicker takes place at white dwarfs and may be an origin of novae. Nuclear-reaction products ejected are positron sources and they may provide MeV positrons as strong as 10−3 cm−2 sec−1 sr−1. Nuclides produced by hydrogen flicker and a part of the carbon-oxygen core ejected may contribute to galactic cosmic rays; their chemical composition is like that observed in cosmic rays.
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Hayakawa, S., Sugimoto, D. Hydrogen flicker and associated high-energy radiation. Astrophys Space Sci 1, 216–229 (1968). https://doi.org/10.1007/BF00717918
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DOI: https://doi.org/10.1007/BF00717918