Astronomy and Astrophysics – Astrophysics
Scientific paper
1996-11-12
Astrophys.J. 471 (1996) 331-351
Astronomy and Astrophysics
Astrophysics
56 pages, 1 Postscript table, 5 Postscript figures, AASTex
Scientific paper
10.1086/177973
During the first 20 seconds of its life, the enormous neutrino luminosity of a neutron star drives appreciable mass loss from its surface. Previous investigations have shown that this neutrino-driven wind could be the site where the r-process occurs. The nucleosynthesis is sensitive to four physical parameters characterizing the wind: its mass loss rate, the entropy per baryon, the electron fraction, and the dynamic time scale. Different authors, using numerical models for supernovae, have arrived at qualitatively different values for these key parameters. Here we derive their values analytically and test our analytic results by numerical calculations using an implicit hydrodynamic code. Employing our analytic and numerical methods, we also investigate how various factors can affect our results. The derived entropy typically falls short, by a factor of two to three, of the value required to produce a strong r-process. Various factors that might give a higher entropy or a more rapid expansion in the wind are discussed.
Qian Yong-Zhong
Woosley Stan E.
No associations
LandOfFree
Nucleosynthesis in neutrino-driven winds: I. The physical conditions does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Nucleosynthesis in neutrino-driven winds: I. The physical conditions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Nucleosynthesis in neutrino-driven winds: I. The physical conditions will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-598971