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BEGIN:VEVENT
DTSTART;TZID=Atlantic/Canary:20201119T103000
DTEND;TZID=Atlantic/Canary:20201119T113000
UID:iactalks-1422
X-WR-CALNAME: IAC Talks: Open Astronomy Seminars
X-ORIGINAL-URL: /iactalks/Talks/view/1422
CREATED:2020-11-19T10:30:00+00:00
X-WR-CALDESC: IAC Talks upcomming talks
SUMMARY:Multiplicity among massive star population
DESCRIPTION:Multiplicity among massive star population\nDr. Laurent Mahy\n\
 nMassive stars are often found to be in pairs. This configuration is both 
 a blessing and a curse. From it, we can estimate their exact properties su
 ch as their masses but the interactions that result during their life cons
 iderably affect the way that the stars evolve.\nHere, we provide an overvi
 ew of progresses made through a number of medium and large surveys. These 
 results provide new insights on the observed and intrinsic multiplicity pr
 operties of massive stars through a large range of masses and at different
  metallicities. Furthermore, to understand how the stars evolve when they 
 are in pair and what are the effects of these interactions on the stellar 
 properties, we undertook a large study of more than 60 massive binaries at
  Galactic and LMC metallicities using spectral disentangling, atmosphere m
 odelling and light curve fitting to determine their stellar parameters, an
 d surface abundances. This unique dataset is the largest sample of binarie
 s composed of at least one O-type star to be studied in such a homogeneous
  way. It allows us to give strong observational constraints to test theore
 tical binary evolutionary tracks, to probe rotational and tidal mixings an
 d mass transfer episodes.
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