University of Minnesota
School of Physics & Astronomy

Physics and Astronomy Calendar

Tuesday, September 17th 2019
11:15 am:
Nuclear Physics Seminar in Tate 301-20
Speaker: Sanjana Curtis, North Carolina State University
Subject: Nucleosynthesis in core-collapse supernovae

Core-collapse supernovae (CCSNe) are highly energetic events that mark the deaths of massive stars. They are one of the most important sites of element synthesis in the universe and drive the chemical evolution of galaxies. A major goal of CCSN studies is to determine how nucleosynthesis outcomes depend on progenitor properties (e.g. mass and metallicity) and explosion details. Traditional calculations do not account for neutrino-matter interactions, thus omitting key microphysics relevant for both the explosion and the explosive nucleosynthesis. In this talk, I will review our current understanding of nucleosynthesis in core-collapse supernovae. I will discuss the PUSH method, a parametrized explosion method based on the neutrino-driven mechanism, and present our nucleosynthesis yields for progenitors of different masses and metallicities. PUSH follows the evolution of the proto-neutron star as well as the electron fraction of the ejecta, allowing a more accurate treatment of nucleosynthesis in the innermost stellar layers. I will contrast our results with more traditional calculations and compare predicted yields to observed supernovae and metal-poor stars. We provide a complete set of isotopic yields that serves as essential input for models of galactic chemical evolution.

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