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PRODID:https://murmitoyen.com/events/vanille/udem/
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UID:69dffb17999e9
DTSTAMP:20260415T165447
DTSTART:20140313T113000
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DTEND:20140313T123000
URL:https://murmitoyen.com/events/vanille/udem/detail/395322
LOCATION:Université de Montréal - Pavillon Roger-Gaudry\, 2900\, chemin d
 e la Tour\, Montréal\, QC\, Canada\, H3T 1J6
SUMMARY:3D hydrodynamic simulations and nucleosynthesis of the i-process
DESCRIPTION:Conférence de Falk Herwig\, University of VictoriaRésuméHigh
 ly non-solar\, anomalous abundance distributions can be found in numerous 
 astrophysical observations\, such as H-deficient post-AGB stars\, C-enhanc
 ed metal-poor stars and pre-solar grains extracted from meteorites. These 
 abundance signatures provide a window into individual nuclear production s
 ites that create the elements. The above examples all provide insight into
  the intermediate neutron capture process that occurs in the convective-re
 active environment of proton-rich material that is ingested into C12-rich 
 convective He-shell burning. New large-scale\, 3-D simulations of the turb
 ulent entrainment and energetic nuclear feedback processes of H-ingestion 
 reveal a previously unknown global oscillation\, and demonstrate that trad
 itional stellar evolution simulations are breaking down in this regime.  
 Preliminary i-process abundance predictions show a surprising agreement wi
 th the previously poorly explained CEMP-s+r stars\, indicating that this e
 xotic neutron-capture process may play an important role in the early univ
 erse.Présentée par le Groupe Astronomie et astrophysique du Départemen
 t de physique de l'Université de Montréal. Cette conférence est destin
 ée à des spécialistes dans le domaine de l'astrophysique et sera donné
 e en anglais.
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