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PRODID:-//Heidelberg University//HePhySTO//EN
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BEGIN:VEVENT
DTEND:20260716T101500Z
UID:c2c1b7ed523319b204fbdc3d5819c3fa@physik.uni-heidelberg.de
DTSTAMP:20260411T171755Z
LOCATION:ARI\, Moenchhofstrasse 12-14\, Seminarraum 1.OG
DESCRIPTION:Westerlund 1 (Wd 1) is the most massive young stellar cluster i
 n the Galaxy\, and hosts a uniquely numerous\, diverse and nearby populatio
 n of evolved massive stars including 24 Wolf-Rayet stars\, several yellow a
 nd red supergiants\, a luminous blue variable and over 100 OB supergiants. 
 In this talk I will report on the supergiant B[e] star Wd1-9\, which we now
  know to be a recently stripped massive binary system deeply embedded in a 
 dense rotating circumstellar medium and bipolar photoevaporating outflow re
 miniscent of a protoplanetary disk wind. I will also detail how hydrodynami
 c simulations of outflows from massive stars coupled with EWOCS data can co
 nstrain supergiant evolutionary pathways in clusters. I will show how a rec
 ent (~10 kyr ago) non-conservative mass transfer event can explain the unus
 ual nebulosity around the WR+O binary system Wd1-72. I will also demonstrat
 e how the mysterious "pillar/rat" nebula in Wd 1 could have been produced b
 y the yellow supergiant Wd1-4 transitioning from a red supergiant in the pa
 st ~15 kyr\, and how similar models of cool supergiants in clusters have th
 e potential to robustly measure their uncertain mass-loss rates.\n\nImporte
 d from https://www.physik.uni-heidelberg.de/hephysto/ (no warranty for accu
 racy).
URL;VALUE=URI:https://www.physik.uni-heidelberg.de/hephysto/index.php?s=tal
 k&id=12575
SUMMARY:ARI Institute Colloquium: Cormac Larkin - The EWOCS view of the mas
 sive stellar zoo Westerlund 1
DTSTART:20260716T091500Z
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