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DTSTART:20130214T113000
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URL:https://murmitoyen.com/events/vanille/udem/detail/180053
LOCATION:Université de Montréal - Pavillon Roger-Gaudry\, 2900\, chemin d
 e la Tour\, Montréal\, QC\, Canada\, H3T 1J6
SUMMARY:The Evolution of Massive Stars towards their Death: Rotation\, Bina
 rity and Mergers 
DESCRIPTION:Selma E. de Mink\, Space Telescope Science Institute / Johns Ho
 pkins UniversityRésumé/abstract:Although they are rare and short-lived\,
  massive stars play a major role in Universe. With their large luminositie
 s\, strong stellar winds and spectacular explosions they act as cosmic eng
 ines\, heating and enriching their surroundings\, where the next generatio
 n of stars and their planets are forming. I will discuss recent developmen
 ts in the massive star community triggered by new surveys and theoretical 
 modeling\, that are slowly changing our general picture of how massive sta
 rs live their lives. In particular\, I will discuss examples of the effect
 s of rotation and binarity can drastically change the properties of both s
 tars (brightness\, color\, ionizing flux\, chemical yields\, X-rays etc.) 
 as well as their final fate as core-collapse and pair-instability supernov
 ae and gamma-ray bursts. These developments call for a critical reconsider
 ation of the implications for a wide variety of astrophysical problems whe
 re the classic stellar models are used\, which do not account for these ef
 fects.Ce séminaire est présenté par le groupe astronomie et astrophysiq
 ue du Département de physique de l'Université de Montréal.
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