BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Talks.cam//talks.cam.ac.uk//
X-WR-CALNAME:Talks.cam
BEGIN:VEVENT
SUMMARY:Nucleosynthesis of the first stellar generations - Georges Meynet 
 (Geneva)
DTSTART:20240613T150000Z
DTEND:20240613T160000Z
UID:TALK216601@talks.cam.ac.uk
CONTACT:107123
DESCRIPTION:The first stellar generations in the Universe were sources of 
 ionizing radiation and of newly synthesized elements. They played a key ro
 le in the reionization process as well as initiating the chemical evolutio
 n of the Universe. The talk will begin recalling the expected main physica
 l properties of the first stellar generations that likely make them to evo
 lve significantly differently from stars in the present-day Universe. We w
 ill then focus on aspects dealing with the chemical enrichments by the fir
 st stellar generations. Comparisons between predictions of models with the
  observed surface composition of halo stars will be presented. The special
  case of the Carbon-Enhanced Metal poor stars (CEMP)\, especially the most
  iron-poor ones\, provide very precious and interesting clues about the ve
 ry early chemical enrichment processes. The talk will end by discussing th
 e extremely interesting cases of nitrogen-rich regions in high redshift ga
 laxies.
LOCATION:Hoyle Lecture Theatre\, Institute of Astronomy
END:VEVENT
END:VCALENDAR