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Astronomy Colloquium - "Rare Elements from the First Stars to Today"

SpeakerIan Roederer, University of Michigan
Date Apr 21, 2015
Time 3:45 pm  
Location Astronomy 134
Sponsor Department of Astronomy
Contact Rebecca Bare
Event type Seminar/Symposium
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Understanding the origin of the elements is one of the major challenges of modern astrophysics. Elements 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 high-resolution spectroscopic data of globular clusters and stars in the stellar halo. I will present recent observations of these elements that successfully muddy our understanding of when and how they were first introduced in the early Universe.

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