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SEQUENCE:1
UID:UW-Physics-Event-6884
DTSTART:20220324T203000Z
DTEND:20220324T220000Z
DTSTAMP:20260414T154055Z
LAST-MODIFIED:20220311T201817Z
LOCATION:4421 Sterling Hall\, Coffee and Cookies at 3:30 pm\, Talk sta
 rts at 3:45 pm
SUMMARY:Whitford Lecture - Massive Star Envelopes and Explosions: 3D S
 imulations and Observational Consequences\, Astronomy Colloquium\, Lar
 s Bildsten\, KITP\, UCSB
DESCRIPTION:Some stars unambiguously reveal their 3D nature to the obs
 erver (e.g. Betelgeuse)\,whereas other stars exhibit phenomena which w
 e attribute to physics that is intrinsically multi-dimensional (e.g. c
 onvection). It has been a theoretical challenge to realistically model
  stars in 3D due to the obvious computational hurdles. This is especia
 lly true when radiative transfer must also be simultaneously solved th
 rough a highly turbulent medium with large density variations. However
 \, computational capabilities have now reached the level where physica
 lly realistic 3D RHD models\, in our case using Athena++\, can be calc
 ulated to levels worthy of comparisons to observations in at least two
  distinct stellar contexts. The first is the outer envelopes of massiv
 e stars on the main sequence\, where TESS observations are finding sur
 prising temporal variability. The second case we are studying is whole
  star convective models of luminous red supergiants at the end of thei
 r lives. The structure of their outer envelopes is manifest when obser
 ved prior to explosion and impacts the early part of the supernovae li
 ght-curves\, especially the initial shock breakout.<br>
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\nWeb L
 ink 
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\nhttps://uwmadison.zoom.us/j/88513896776?pwd=Y1JtRE1KZllxWkFT
 amJBSGtGdm9yQT09
URL:https://www.physics.wisc.edu/events/?id=6884
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