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PRODID:-//Heidelberg University//HePhySTO//EN
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BEGIN:VEVENT
DTEND:20270114T111500Z
UID:e62724f48ef1470cfecaadbc771f4ef6@physik.uni-heidelberg.de
DTSTAMP:20261007T225157Z
LOCATION:ARI\, Moenchhofstrasse 12-14\, Seminarraum 1.OG
DESCRIPTION:Very massive stars (VMS) are born with masses above 100 Msun an
 d represent the most extreme\, albeit rare\, class of stellar objects. They
  shine with luminosities exceeding a million times that of the Sun and\ndri
 ve powerful line-driven winds that inject momentum and chemically processed
  material into the interstellar medium. VMS are invoked to explain distinct
 ive spectral features in unresolved stellar populations\, yet the stars the
 mselves remain poorly understood. At the highest masses\, the scarcity of o
 bservational constraints limits our ability to test models of VMS evolution
 \, while at high metallicity\, uncertainties in mass loss remain a major ch
 allenge. In this talk\, I will motivate the detailed investigation of O/WNh
  stars as key laboratories\nfor probing VMS evolution. In the Milky Way\, o
 nly nine such stars are currently known\, and none has\npreviously been qua
 ntitatively characterized using detailed stellar atmosphere modeling. For t
 he first time\, we have computed models reproducing the observed optical sp
 ectrum of WR 31-1\, the most luminous Galactic O/WNh star. I will present t
 he results of this pilot study and discuss how they motivate future targete
 d observational campaigns.\n\nImported from https://www.physik.uni-heidelbe
 rg.de/hephysto/ (no warranty for accuracy).
URL;VALUE=URI:https://www.physik.uni-heidelberg.de/hephysto/index.php?s=tal
 k&id=13015
SUMMARY:ARI Institute Colloquium: Joris Josiek - WR 31-1 and the search for
  Very Massive Stars in the Milky Way
DTSTART:20270114T101500Z
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