Production of Light Element Primary Process nuclei in neutrino-driven winds
Abstract
We present first comparisons between Light Element Primary Process (LEPP) abundances observed in some ultra metal poor (UMP) stars and nucleosynthesis calculations based on long-time hydrodynamical simulations of core-collapse supernovae and their neutrino-driven wind. UMP star observations indicate Z>38 elements include the contributions of at least two nucleosynthesis components: r-process nuclei that are synthesized by rapid neutron capture in a yet unknown site and LEPP elements (mainly Sr, Y, Zr). We show that neutrino-driven wind simulations can explain the observed LEPP pattern. We explore in detail the sensitivity of the calculated abundances to the electron fraction, which is a key nucleosynthesis parameter but poorly known due to uncertainties in neutrino interactions and transport. Our results show that the observed LEPP pattern can be reproduced in proton- and neutron-rich winds.
Keywords
Cite
@article{arxiv.1007.1275,
title = {Production of Light Element Primary Process nuclei in neutrino-driven winds},
author = {A. Arcones and F. Montes},
journal= {arXiv preprint arXiv:1007.1275},
year = {2011}
}
Comments
26 pages, 16 figures, new version, accepted for publication in ApJ