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PRODID:UW-Madison-Physics-Events
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SEQUENCE:1
UID:UW-Physics-Event-8225
DTSTART:20230330T203000Z
DTEND:20230330T213000Z
DTSTAMP:20260414T054148Z
LAST-MODIFIED:20230310T152741Z
LOCATION:4421 Sterling Hall
SUMMARY:Photochemical Processing in Protoplanetary Disks: Insights fro
 m Our Solar System\, Astronomy Colloquium\, Fred Ciesla\, University o
 f Chicago
DESCRIPTION:Protoplanetary disks are sites of active chemistry\, where
  materials inherited from a natal molecular cloud are transformed into
  the building blocks of planets.  Astronomical observations of such di
 sks have shown how important photon-driven chemistry is to understandi
 ng this transformation\, because young stars emit copious amounts of U
 V photons which can drive chemical reactions and because the regions w
 e are able to characterize are those where these photons are readily a
 bsorbed.  However\, planet formation occurs deep inside these protopla
 netary disks\, around the disk midplane\, where energetic photons are 
 expected to be largely absent.  While mixing between these layers will
  occur\, it remains unclear how much the products of photochemical rea
 ctions contribute to setting the compositions of the planets that ulti
 mately form.  In this talk\, I will describe modeling we have done to 
 investigate proposed photochemical signatures seen in primitive meteor
 ites and what this implies about the role the chemical evolution that 
 shaped planetary building blocks in our own solar nebula.
URL:https://www.physics.wisc.edu/events/?id=8225
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