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DTSTAMP:20260416T044018
DTSTART:20130926T113000
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URL:https://murmitoyen.com/events/vanille/udem/detail/287786
LOCATION:Université de Montréal - Pavillon Roger-Gaudry\, 2900\, chemin d
 e la Tour\, Montréal\, QC\, Canada\, H3T 1J6
SUMMARY:The role of gas in debris disks
DESCRIPTION:Conférence d'Alexis Brandeker\, Stockholm ObservatoryRésumé 
 :Debris disks are believed to be the products of colliding planetesimals\,
  remnants from the planet formation process. In contrast to the protoplane
 tary disks\, the debris disks are gas poor. They are not completely devoid
  of gas\, however\, a discovery that has been a rich source of puzzlement 
 and speculation. Some of the questions that arise are: Where does the gas 
 come from and what keeps it from blowing away by the stellar radiation pre
 ssure? Solving these questions have the potential to shed light on the che
 mical composition of the building blocks of planets\, the planetesimals. A
 nother potentially important effect of the gas is inducing structure into 
 the dust disk through gas-dust interactions\, possibly mimicking planetary
  herding of the dust and putting into question inferences of exoplanets fr
 om disk structure alone. A recent example that will be discussed is that o
 f Fomalhaut.Présentée par le Groupe Astronomie et astrophysique du Dép
 artement de physique de l'Université de Montréal. Cette conférence est 
 destinée à des spécialistes dans le domaine de l'astrophysique et sera 
 donnée en anglais. 
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