General relativistic effects on neutrino driven wind from young, hot neutron star and the r process nucleosynthesis
Nov, 1999
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Abstract: (arXiv)
Neutrino-driven wind from young hot neutron star, which is formed by supernova explosion, is the most promising candidate site for r-process nucleosynthesis. We study general relativistic effects on this wind in Schwarzschild geometry in order to look for suitable conditions for a successful r-process nucleosynthesis. It is quantitatively discussed that the general relativistic effects play a significant role in increasing entropy and decreasing dynamic time scale of the neutrino-driven wind. Exploring wide parameter region which determines the expansion dynamics of the wind, we find interesting physical conditions which lead to successful r-process nucleosynthesis. The conditions which we found realize in the neutrino-driven wind with very short dynamic time scale ms and relatively low entropy . We carry out the -process and r-process nucleosynthesis calculation on these conditions by the use of our single network code including over 3000 isotopes, and confirm quantitatively that the second and third r-process abundance peaks are produced in the neutrino-driven wind.Note:
- Accepted for publication in ApJ
- n: matter
- light nucleus: production
- space-time: Schwarzschild
- general relativity
- entropy
- neutrino: cosmic radiation
- supernova
- numerical calculations: interpretation of experiments
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