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UID:69e0430288b96
DTSTAMP:20260415T220138
DTSTART:20140116T113000
SEQUENCE:0
TRANSP:OPAQUE
DTEND:20140116T123000
URL:https://murmitoyen.com/events/vanille/udem/detail/361338
LOCATION:Université de Montréal - Pavillon Roger-Gaudry\, 2900\, chemin d
 e la Tour\, Montréal\, QC\, Canada\, H3T 1J6
SUMMARY:SdBs\, Synchronization\, and Evolution: The Benefits of Pulsations 
 in Binaries
DESCRIPTION:Conférence de Bert Pablo\, Université de Montréal.Résumé 
 Subdwarf B (sdB) stars are evolved helium burning stars that have masses o
 f around 0.5 Msun. Their formation therefore requires significant mass los
 s typically due to binary evolution.  sdB stars found in close binaries (
 P< 10 days) have gone through the Common Envelope formation channel where 
 much of the primaries star's mass is ejected as the companion spirals in. 
 With the onset of Kepler it became possible to monitor these very faint bi
 nary systems for extended periods of time. This along with near micro-magn
 itude photometric precision has allowed for significant advancements in th
 e asteroseismic analysis of these stars.Specifically\, this has led to an 
 dramatic increase in the number of observed pulsation modes which has enab
 led the calcuation of rotation periods for many of these stars. In this ta
 lk I will discuss the derivation of rotation periods in three close sdB bi
 naries and the implications on the synchronization state of these systems.
   I will then discuss the consequences for all close sdB binaries and how
  these systems can be used to place constraints on the common envelope pha
 se of binary evolution.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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