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PRODID:https://murmitoyen.com/events/vanille/udem/
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UID:69e057d66914c
DTSTAMP:20260415T233030
DTSTART:20140130T113000
SEQUENCE:0
TRANSP:OPAQUE
DTEND:20140130T123000
URL:https://murmitoyen.com/events/vanille/udem/detail/371682
LOCATION:Université de Montréal - Pavillon Roger-Gaudry\, 2900\, chemin d
 e la Tour\, Montréal\, QC\, Canada\, H3T 1J6
SUMMARY:Surface magnetic fields as windows to stellar internal structure an
 d evolutionary history 
DESCRIPTION:Conférence de Greg Wade\, RMC. KingstonRésumé The surface m
 agnetic fields of non-degenerate stars are sensitive probes of their curre
 nt internal structure and evolutionary histories. During the past decade\,
  comprehensive studies of large-scale stellar surface magnetic field topol
 ogies have been achieved using tomographic reconstruction based on high-re
 solution spectropolarimetric time series observations. On the one hand\, t
 hese investigations have revealed systematic relationships between field c
 haracteristics and the evolutionary situation of cool\, low-mass stars. Th
 ese relationships represent important new observational constraints impose
 d on dynamo models\, and the evolution of dynamo physics through the pre-m
 ain sequence to the main sequence. On the other hand\, the characteristics
  of magnetism in higher-mass stars are found be remarkably uniform\, at bo
 th the pre-main sequence and main sequences phases\, over more than 1.5 de
 cades in stellar mass. This fundamental result strengthens the view that t
 hese fields are of fossil origin\, produced as the consequence of common e
 lements of their evolutionary history predating the earliest observable pr
 e-main sequence phases.Présentée par le Groupe Astronomie et astrophysiq
 ue du Département de physique de l'Université de Montréal. Cette conf
 érence est destinée à des spécialistes dans le domaine de l'astrophysi
 que et sera donnée en anglais.
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