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SUMMARY:Early r-process enrichment in globular clusters - Evan Kirby (Univ
 ersity of Notre Dame)
DTSTART:20240522T140000Z
DTEND:20240522T150000Z
UID:TALK217018@talks.cam.ac.uk
CONTACT:Sandro Tacchella
DESCRIPTION:Stars in nearly all globular clusters show complex relations a
 mong the abundances of light elements (up to Na).  Many also show anti-cor
 relations of Mg and Al.  Until now\, only one cluster (M15) conclusively s
 howed any star-to-star variation in neutron-capture elements\, like Eu.  U
 sing a trick of stellar evolution\, I show that these variations are primo
 rdial\, not caused by external pollution.  Then\, I show that M92 also has
  variations in barium and lanthanide abundances (but not first-peak r-proc
 ess) among the first generation of stars but not the second.  The evidence
  points to a rare source of the "main" r-process that happened right at th
 e start of the formation of the cluster.\n
LOCATION:Battcock Coffee Area 
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