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Title: A dear child has many names - Production of the light neutron-capture elements
Speaker: Terese Hansen
Affiliation: Stockholm University
Time: Thursday 29 September 2022, 1400 to 1500
Location: 80101Å
Abstract:
Elements heavier than iron are produced via neutron capture, with roughly half being produced via the slow (s)-process and half via the rapid (r)-process. In the early Universe, the r-process is the dominant process. However, a large scatter is detected among the light neutron-capture elements such as Sr, Y, and Zr, with some stars, for example, HD122563, exhibiting large enhancement in these elements. Furthermore, studies have revealed that the abundances of light neutron-capture elements such as Ag and Pd do not correlate with the abundances of heavier r-process elements such as Eu, suggesting a separate nucleosynthesis process is responsible for the creation of elements like Ag and Pd. Multiple papers have identified this process giving it different labels; the Light Element Primary Process, the weak r-process or the limited r-process. I will attempt to give an overview of the current status of the production of the light neutron-capture elements in the early Universe and present new results from the R-Process Alliance investigations into the production of these elements.