Feb 7 – 9, 2017
Radisson Hotel Lansing
US/Eastern timezone

Investigating and reducing the impact of nuclear reaction rate uncertainties on 44Ti- production in core-collapse supernovae

Feb 7, 2017, 4:45 PM
1h 15m
Radisson Hotel Lansing

Radisson Hotel Lansing

111 N Grand Ave, Lansing, MI 48933
Poster [Main Conference] Poster session

Speaker

Mr Shiv Kumar Subedi (Ohio University)

Description

Recent observational advances have enabled high resolution mapping of 44Ti in core-collapse supernovae (CCSN) remnants. Comparison 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 production in model calculations. We are using MESA as a tool to investigate the previously identified sensitivities of 44Ti production in CCSN to varied reaction rates. MESA (Modules for Experiments in Stellar Astrophysics) is a 1D stellar evolution code. We will present the simulation results and our plans to reduce or remove the most significant uncertainties from (alpha,n) and (p,gamma) reaction rates using direct and indirect measurement techniques at the Edwards Accelerator Lab at Ohio University. Reactions of interest include 42Ca(alpha,n), 34S(alpha,n), 41Sc(p,gamma) and 43Sc(p,gamma).

Primary author

Mr Shiv Kumar Subedi (Ohio University)

Co-authors

Prof. C.R. Brune (Ohio University) Mr Doug Soltesz (Ohio University) Ms Kristyn Brandenburg (Ohio University) Dr T.N. Massey (Ohio University) Dr Zach Meisel (Ohio University)

Presentation materials

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