Production of {sup 44}Ti in neutrino-driven aspherical supernova explosions

Journal Article · Fri May 02 04:00:00 EDT 2014 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.4874085· OSTI ID:22280475

Fujimoto, Shin-ichiro ^[1]; Ono, Masaomi; Hashimoto, Masa-aki ^[2]; Kotake, Kei ^[3]

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1. Kumamoto National College of Technology, 2659-2 Suya, Goshi 861-1102 (Japan)
2. Department of Physics, School of Sciences, Kyushu University, Fukuoka 810-8560 (Japan)
3. National Astronomical Observatory Japan, 2-21-1, Osawa, Mitaka, Tokyo, 181-8588 (Japan)

We examine the synthesis of {sup 44}Ti in a neutrino-driven aspherical supernova (SN), focusing on reaction rates related to {sup 44}Ti and rotation of a progenitor. We have performed 2D hydrodynamic simulations of SN of a 15M{sub ⊙} 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 {sup 40}Ca(α,γ){sup 44}Ti and the slower rate of {sup 44}Ti(α,p){sup 47}V lead to more massive ejection of {sup 44}Ti and {sup 56}Ni and larger ratios <{sup 44}Ti/{sup 56}Ni>. Faster rotation also results in more massive ejection of {sup 44}Ti and {sup 56}Ni. Ratios <{sup 44}Ti/{sup 56}Ni> are however independent from rotation. Large masses of {sup 44}Ti and large ratios observed in SN 1987A and Cas A (> 1O{sup −4}M{sub ⊙} and 1-2 respectively) are not realized in all the models.

• OSTI ID: 22280475
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 1594; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
ALPHA REACTIONS
ANGULAR VELOCITY
ASTROPHYSICS
CALCIUM 40 TARGET
COMPUTERIZED SIMULATION
COSMIC NEUTRINOS
COSMOLOGY
NICKEL 56
NUCLEAR REACTION KINETICS
NUCLEOSYNTHESIS
ROTATION
TITANIUM 44
TITANIUM 44 TARGET
VANADIUM 47