Synthesis of Very Heavy Elements in Supermassive Stars

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概要

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• The synthetic processes of very heavy elements taking place in a supermassive star expanding from a very high temperature are investigated. Since the temperature is exceedingly high and the proton mass fraction is much larger than the mass fractions of free neutrons or heavy elements, p-process-like nuclear reactions would occur and the proton-rich heavy nuclides in the mass-region 150≲A≲215 may be produced in this type of stars. The mass fracrtions in the expanding shell in the regions 100≲A≲150, 150≲A≲210 and 210≲A≲215 are, respectively, 10^<-15∿-16>ξ,10^<-10∿-12>ξ and 10^<-8∿-10>ξ, where ξis a parameter presumably being around unity. If the mixing mechanisms of elements have not effectively operated in the universe or in the Galaxy, we can expect the possibility for finding out the stars or stellar systems possessing the anomalously high abundances of very heavy elements in A≳150.

• 理論物理学刊行会の論文

著者

• Ohnishi Teruaki

  Institute Of Atomic Energy Kyoto University

関連論文

• Synthesis of Very Heavy Elements in Supermassive Stars
• Possible Existence of Another Polymer, Poly-C_2H_2, in Interstellar Space
• Nucleosynthesis of Superheavy Elements in the Universe
• Nuclear Synthetic Processes in Supernova Inner Shells
• Chemical Evolution of Spiral Galaxy

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