2010ApJ...718L.137N -
Astrophys. J., 718, L137-L140 (2010/August-1)
Boron synthesis in type IC supernovae.
NAKAMURA K., YOSHIDA T., SHIGEYAMA T. and KAJINO T.
Abstract (from CDS):
We investigate the ν-process in an energetic Type Ic supernova (SN Ic) and the resultant productions of the light elements including boron and its stable isotopes. SN Ic is a very unique boron source because it can produce boron not only through spallation reactions as discussed in Nakamura & Shigeyama but also the ν-process. The ν-process is considered to occur in core-collapse supernovae and previous studies were limited to SNe II. Although the progenitor star of an SN Ic does not posses an He envelope so that 7Li production via the ν-process is unlikely, 11B can be produced in the C-rich layers. We demonstrate a hydrodynamic simulation of a SN Ic explosion and estimate the amounts of the light elements produced via the ν-process for the first time, and also the subsequent spallation reactions between the outermost layers of the compact SN Ic progenitor and the ambient medium. We find that the ν-process in the current SN Ic model produces a significant amount of 11B, which is diluted by 10B from spallation reactions to get closer to B isotopic ratios observed in meteorites. We also confirm that high-temperature µ and τ neutrinos and their anti-neutrinos, reasonably suggested from the compact structure of SN Ic progenitors, enhance the light-element production through the neutral current reactions, which may imply an important role of SNe Ic in the Galactic chemical evolution.
Abstract Copyright:
∼
Journal keyword(s):
nuclear reactions, nucleosynthesis, abundances - stars: abundances - supernovae: general
Simbad objects:
3
Full paper
View the references in ADS
To bookmark this query, right click on this link: simbad:2010ApJ...718L.137N and select 'bookmark this link' or equivalent in the popup menu