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PRODID:-//Heidelberg University//HePhySTO//EN
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BEGIN:VEVENT
DTEND:20260723T101500Z
UID:b5130151420a1eaa7b7032ddaef9a8dc@physik.uni-heidelberg.de
DTSTAMP:20260411T173009Z
LOCATION:ARI\, Moenchhofstrasse 12-14\, Seminarraum 1.OG
DESCRIPTION:Hot\, massive stars are astrophysical keystones which shape the
 ir environment via mechanical and radiative feedback and chemically enrich 
 their cosmic neighborhood since the first generation of (very) massive star
 s. However\, turning this general textbook picture into quantitative predic
 tion remains an ongoing challenge. Recent discoveries\, such the surprising
 ly high metallicity and early nitrogen enrichment in high-redshift galaxies
  discovered by JWST\, put current descriptions and modelling approaches int
 o question\, illustrating that the complex puzzle of massive stars and thei
 r interplay is everything but complete.\nTo get a robust\, quantitative und
 erstanding\, decoding and predicting the light of hot massive stars marks a
 n astrophysical key technique. Revolving around via the development and app
 lication of expanding stellar atmosphere models for hot stars\, I will pres
 ent a selection of recent research results from my group. A particular focu
 s will be on star with strong stellar winds\, their enigmatic cosmic role\,
  and the challenge to get a coherent structural and evolutionary understand
 ing of these objects. Moreover\, I will present our recent discovery of an 
 unexpected direct transition in the Wolf-Rayet regime from WN to WO subtype
  occuring at subsolar metallicity as well as ongoing and forthcoming effort
 s in further developing atmosphere modelling and quantitative spectroscopy.
 \n\nImported from https://www.physik.uni-heidelberg.de/hephysto/ (no warran
 ty for accuracy).
URL;VALUE=URI:https://www.physik.uni-heidelberg.de/hephysto/index.php?s=tal
 k&id=12576
SUMMARY:ARI Institute Colloquium: Andreas Sander - Hot\, massive stars and 
 their winds: New insights and open puzzles
DTSTART:20260723T091500Z
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