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VERSION:2.0
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PRODID:UW-Madison-Physics-Events
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SEQUENCE:1
UID:UW-Physics-Event-9526
DTSTART:20261009T203000Z
DTEND:20261009T213000Z
DTSTAMP:20261008T105155Z
LAST-MODIFIED:20261005T171334Z
LOCATION:Chamberlin 2241 - https://uwmadison.zoom.us/j/96927300636?pwd
 =2Gjt5BXqG7T3FfvBQ8C5okcNldSzzn.1
SUMMARY:Mapping the Evolution of Planet-Forming Disks: From Global Gas
  Reservoirs to Inner Chemistry\, Physics Department Colloquium\, Ke (C
 oco) Zhang\, University of Wisconsin-Madison
DESCRIPTION:Protoplanetary disks are cradles of planet formation. Thes
 e disks play a vital role in shaping fundamental properties of planeta
 ry systems\, such as the number of rocky and giant planets\, as well a
 s the bulk compositions of planetary cores and primordial planetary at
 mospheres. Gas is the dominant mass constituent in protoplanetary disk
 s\, taking 99% of mass initially. Yet\, it is still unclear how the ga
 s mass evolves and what mechanism drives its evolution\, which has bec
 ome a major challenge in understanding planet formation processes. In 
 this talk\, I will discuss results from the ALMA survey of Gas Evoluti
 on in PROtoplanetary disk\, AGE-PRO\, an ALMA Cycle 8 large program. W
 e collected and analyzed deep ALMA observations of a comprehensive sam
 ple of 30 disks throughout the typical disk lifetime. By combining AGE
 -PRO observations and state-of-the-art thermo-chemical models\, we pro
 vide accurate gas mass and size measurements of these disks. I will di
 scuss how our results are compared with predictions from two leading t
 heories of disk evolution: Turbulent viscosity and Magneto-hydrodynami
 cal disk winds. Finally\, I will show the JWST MIRI observations of th
 e same sample\, which provides important insight into the chemical evo
 lution in the inner few au region.
URL:https://www.physics.wisc.edu/events/?id=9526
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