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UID:UW-Physics-Event-5082
DTSTART:20190328T203000Z
DTEND:20190328T220000Z
DTSTAMP:20260314T091326Z
LAST-MODIFIED:20190319T140626Z
LOCATION:4421 Sterling Hall\, Coffee and cookies 3:30 PM\, Talk begins
  3:45 PM
SUMMARY:Clues to Globular Cluster Formation\, Astronomy Colloquium\, D
 avid Nataf\, The Johns Hopkins University
DESCRIPTION:Globular clusters are now well-established to host “Seco
 nd-generation” stars\, which show anomalous abundances in some or al
 l of He\, C\, N\, O\, Na\, Al\, Mg\, etc.  The simplest explanations f
 or these phenomena typically require the globular clusters to have bee
 n ~20x more massive at birth\, and to have been enriched by processes 
 which are not consistent with the theoretical predictions of massive s
 tar chemical synthesis models. The library of observations is now a va
 st one\, yet there has been comparatively little progress in understan
 ding how globular clusters could have formed and evolved. In this talk
  I discuss two new insights into the matter. First\, I report on a met
 a-analysis of globular cluster abundances that combined APOGEE and lit
 erature data for 42 globular clusters\, new trends with globular clust
 er mass are identified. I discuss the chemical properties of former gl
 obular cluster stars that are now part of the field population\, and w
 hat can be learned. Finally\, use updated state-of-the-art massive sta
 r stellar evolution models from the Padova group to make predictions f
 or the upcoming and inevitable JWST observations of young globular clu
 ster progenitors in their starburst phase.
URL:https://www.physics.wisc.edu/events/?id=5082
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