Production of in neutrino-driven aspherical supernova explosions
Feb 17, 20155 pages
Part of Proceedings, 12th International Symposium on Origin of Matter and Evolution of the Galaxies (OMEG12) : Tsukuba, Japan, November 18-22, 2013, 296-300
Published in:
- AIP Conf.Proc. 1594 (2015) 1, 296-300
Contribution to:
- , 296-300
- OMEG12
- Published: Feb 17, 2015
DOI:
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Abstract:
We examine the synthesis of 44 Ti in a neutrino-driven aspherical supernova (SN), focusing on reaction rates related to 44 Ti and rotation of a progenitor. We have performed 2D hydrodynamic simulations of SN of a 15 M progenitor, whose angular velocity is manually set to be a cylindrical distribution and have followed explosive nucleosynthesis in the ejecta. We find that the faster rates of 40 Ca ( α , γ ) 44 Ti and the slower rate of 44 Ti ( α , p ) 47 V lead to more massive ejection of 44 Ti and 56 Ni and larger ratios < 44 Ti/ 56 Ni>. Faster rotation also results in more massive ejection of 44 Ti and 56 Ni. Ratios < 44 Ti/ 56 Ni> are however independent from rotation. Large masses of 44 Ti and large ratios < 44 Ti/ 56 Ni> observed in SN1987A and Cas A ( > 10 − 4 M and 1-2 respectively) are not realized in all the models- Nuclear reactions
- nucleosynthesis
- abundances — stars: supernovae: general
- Explosions
- Explosive nucleosynthesis
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