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

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Hubble Space Telescope (NASA)
May 24, 2016
11:30AM - 12:30PM
Location
PRB 4138

Date Range
Add to Calendar 2016-05-24 11:30:00 2016-05-24 12:30:00 CCAPP Seminar: "Rare Elements from the First Stars to Today" Ian Roederer (Michigan) 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 PRB 4138 Center for Cosmology and AstroParticle Physics (CCAPP) ccapp@osu.edu America/New_York public
Description

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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