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VERSION:2.0
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PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:1
UID:UW-Physics-Event-8010
DTSTART:20221201T213000Z
DTEND:20221201T223000Z
DTSTAMP:20260411T224216Z
LAST-MODIFIED:20221115T153026Z
LOCATION:4421 Sterling Hall
SUMMARY:Why do massive stars have "inflated" cores?\, Astronomy Colloq
 uium\, Dr. Evan Henry Anders\, Northwestern University
DESCRIPTION:Stars with masses greater than about 1.1 M_sun have turbul
 ent convection in their cores. Standard stellar evolution models fail 
 to reproduce many observations\, but models and observations can be br
 ought into agreement by "inflating" the core with excess mixing beyond
  the boundary of the convection zone. In this colloquium\, I will pres
 ent a review of observations of excess mixing in the cores of massive 
 stars. I will discuss how excess mixing affects stellar evolution and 
 the populations of stars and compact objects which are being character
 ized by space-based missions like Gaia and ground-based gravitational 
 wave interferometers like LIGO. I will then discuss different forms of
  convective boundary mixing from a fluid dynamics perspective\, talkin
 g about three processes which likely occur in stellar interiors. I wil
 l discuss one or two sets of simulations which we are using to shed li
 ght on this tricky problem in modern stellar astrophysics.
URL:https://www.physics.wisc.edu/events/?id=8010
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