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UID:69e0129ed8903
DTSTAMP:20260415T183510
DTSTART:20140227T113000
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URL:https://murmitoyen.com/events/vanille/udem/detail/387550
LOCATION:Université de Montréal - Pavillon Roger-Gaudry\, 2900\, chemin d
 e la Tour\, Montréal\, QC\, Canada\, H3T 1J6
SUMMARY:The Magnetism of Massive Stars
DESCRIPTION:Conférence de Véronique Petit\, University of DelawareRésum
 éLow mass stars\, like our sun\, have long been known to display dynamo-g
 enerated magnetic activity. More massive stars\, over five times the mass 
 of our Sun\, were not thought to be able to sustain such magnetic dynamos\
 , despite observations that have indirectly suggested the possibility of m
 agnetic fields at their surfaces. Until this decade\, very few high-mass s
 tars had been clearly identified as magnetic. The advent of a new generati
 on of powerful spectropolarimeters has resulted in a flood of detailed inf
 ormation about the magnetic properties of massive stars. This presentation
  will describe new constraints on the nature and origins of magnetic field
 s in high-mass stars\, provided by the Magnetism in Massive Stars project\
 , and review our current understanding of the impact of magnetism on the l
 ives of the most massive stars. I will also explain how it is possible to 
 characterize the magnetic fields of stars thousands of light-years away by
  studying their polarized light. Finally\, I will discuss how other observ
 ational diagnostics\, e.g. optical and X-ray emission\, relate to the infe
 rred magnetic properties of these stars\, and summarize prospects for futu
 re developments in our understanding of massive-star magnetospheres.Prése
 ntée par le Groupe Astronomie et astrophysique du Département de physiq
 ue de l'Université de Montréal. Cette conférence est destinée à des s
 pécialistes dans le domaine de l'astrophysique et sera donnée en anglai
 s.
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