R-Process Nucleosynthesis in MHD Jet Explosions of Core-Collapse Supernovae. (22nd October 2013)

• Record Type: Journal Article
• Authors: Saruwatari, Motoaki; Hashimoto, Masa-aki; Fukuda, Ryohei; Fujimoto, Shin-ichiro
• Other Names: Cui W. Academic Editor.; Fan Y.-Z. Academic Editor.; Valdés-Galicia J. F. Academic Editor.
• Is Part Of: Journal of astrophysics. Volume 2013(2013)
• Publication Date: 2013-10-22
• Subjects: Astrophysics -- Periodicals; Astrophysics; Periodicals; 523.01
• DOI: 10.1155/2013/506146
• Languages: English
• ISSNs: 2356-718X

Abstract

Abstract : We investigate ther -process nucleosynthesis during the magnetohydrodynamical (MHD) explosion of a supernova in a helium star of 3.3 M ⊙, where effects of neutrinos are taken into account using the leakage scheme in the two-dimensional (2D) hydrodynamic code. Jet-like explosion due to the combined effects of differential rotation and magnetic field is able to erode the lower electron fraction matter from the inner layers. We find that the ejected material of low electron fraction responsible for ther -process comes out from just outside the neutrino sphere deep inside the Fe-core. It is found that heavy element nucleosynthesis depends on the initial conditions of rotational and magnetic fields. In particular, the third peak of the distribution is significantly overproduced relative to the solar system abundances, which would indicate a possibler -process site owing to MHD jets in supernovae.