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PRODID:UW-Madison-Physics-Events
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SEQUENCE:1
UID:UW-Physics-Event-9812
DTSTART:20260917T203000Z
DTEND:20260917T213000Z
DTSTAMP:20260828T043950Z
LAST-MODIFIED:20260826T122628Z
LOCATION:4421 Sterling Hall
SUMMARY:Tracking the Grist and Flakes of Planetesimals with Dust Polar
 ization \, Astronomy Colloquium\, Daniel Lin\, Jansky Postdoctoral Fel
 low\, NRAO
DESCRIPTION:How planetesimals form and evolve in circumstellar disks i
 s one of the most important questions in astrophysics. In this talk\, 
 I will demonstrate that polarization is a unique tool for studying the
  properties of dust grains throughout the planet formation process. In
  protoplanetary disks\, ALMA has revolutionized the field of disk-scal
 e polarization by detecting and resolving percent-level polarization. 
 I will first present observational evidence of large\, scattering\, al
 igned grains. I will then introduce a new grain alignment mechanism th
 at can trace the relative motion between dust and gas offering a conne
 ction to how planetesimals form. In debris disks\, where planetesimals
  have fully formed\, I will demonstrate how dust polarization\, aided 
 by neural networks\, can constrain dust composition. 
URL:https://www.physics.wisc.edu/events/?id=9812
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