General relativistic effects on neutrino driven wind from young, hot neutron star and the r process nucleosynthesis

Nov, 1999
20 pages
Published in:
  • Astrophys.J. 533 (2000) 424
e-Print:

Citations per year

19992005201120172023051015
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 τdyn6\tau_{\rm dyn} \sim 6 ms and relatively low entropy S140S \sim 140. We carry out the α\alpha-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