CCAPP Seminar: "Rare Elements from the First Stars to Today" Ian Roederer (Michigan)

June 17, 2016
Tuesday, May 24, 2016 - 11:30am to 12:30pm
PRB 4138
Hubble Space Telescope (NASA)

Understanding the origin of the elements is one of the major challenges of modern astrophysics. Elements listed along the bottom two-thirds of the periodic table---including arsenic, selenium, barium, europium, lead, thorium, uranium, and others---are mainly produced by neutron-capture reactions. Some had not been detected previously in late-type stars, and the origins of all are not fully understood at present. My work focuses on abundances derived from ultraviolet and optical high-resolution spectroscopic data of dwarf galaxies, globular clusters, and field stars in the stellar halo. I will present recent observations of these elements that change our understanding of when and how they were first produced in the early Universe.
Image Credit: NASA

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