Reaction rates that limit 44Ti from core-collapse supernovae as dense matter constraint: Shocking results
Abstract
Recent observational advances have enabled high resolution mapping of 44Ti in core-collapse supernova (CCSN) remnants. Comparisons between observations and 3D models provide stringent constraints on the CCSN mechanism. However, recent work has identified several uncertain nuclear reaction rates that influence 44Ti and 56Ni production in model calculations of shock-driven nucleosynthesis. We evolved 15M⊙, 18M⊙, 22M⊙ and 25M⊙ stars from ZAMS to CCSN in MESA (Modules for Experiments in Stellar Astrophysics) and investigated previously identified sensitivities of 44Ti and 56Ni production in CCSN to varied reaction rates. I will present our final results of this sensitivity study. I will also briefly discuss ongoing experimental work motivated by this study namely a direct cross section measurement of 39K(p, γ)40Ca.
This work was supported in part by the DOE Office of Science under Grants DE-FG02-88ER40387 and DE-SC0019042.- Publication:
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APS Division of Nuclear Physics Meeting Abstracts
- Pub Date:
- 2019
- Bibcode:
- 2019APS..DNP.RM006S