Dear colleagues,
We (Weiping Liu, Kajino san and I) have invited Prof. Wiescher to give a talk on nuclear astrophysics.
First Steps in the Chemical Evolution of the Universe
Speaker: Michael Wiescher University of Notre Dame Time: 7pm, June 10, 2021, Thursday （Beijing) Zoom ID: 858 9448 4583 (Passcode: 880894) https://us02web.zoom.us/j/85894484583?pwd=aXlSb1NIWWpFWDlCQXNoakIwQUg3Zz09
Abstract:
The chemical evolution of the universe is dictated by nucleosynthesis processes in multiple generations of stars as the cauldrons of the cosmos. The first generation of stars burn on the ashes of the Big Bang, the primordial abundances of hydrogen, helium and a bit of lithium. The chemical analysis of the eldest observed stars, however, shows a pronounced abundance distribution between carbon, oxygen up to calcium with a few scattered observations of Fe, Ti, and Sr. The reaction chains bridging the mass gap of instability at A=5 and A=8 isotopes and feeding the CNO range, rely on the alpha cluster configuration of light nuclei. Several possible nucleosynthesis patterns will be discussed that facilitate further processing of CNO isotopes up to the Ca-Fe range. These first steps in the chemical evolution of the universe will be presented in the context of new experimental data, which provide new insight in the complex and highly dynamic nucleosynthesis environment of first stars.
Please help us distribute the poster within your community and mark your calendar if you are interested in it.
Best regards,
Xiaodong