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SUMMARY:The ALMA View of Planet Formation - Jane Huang (University of Mich
 igan\, Sagan Fellow)
DTSTART:20210202T130000Z
DTEND:20210202T140000Z
UID:TALK155557@talks.cam.ac.uk
CONTACT:Dr Can Cui
DESCRIPTION:The building blocks of planets are the dust\, gas\, and ice in
  the protoplanetary disks orbiting young stars. Deep\, high resolution ima
 ges of protoplanetary disks by ALMA have revealed complex and varied ring 
 and spiral structures in a number of systems. In the Disk Substructures at
  High Angular Resolution Project (DSHARP)\, we undertook the first high an
 gular resolution disk survey at millimeter wavelengths. DSHARP found that 
 gaps and rings indicative of planet-disk interactions were widespread\, im
 plying that giant planet formation proceeds rapidly even at tens of au fro
 m the star. On the other hand\, the origins of "grand design" millimeter c
 ontinuum spiral arms are more enigmatic\, and may point either to disk ins
 tabilities or the formation of super-Jovian planets at surprisingly wide s
 eparations. Gaps and rings are also common in molecular emission\, and app
 ear primarily to result from vigorous chemical reprocessing in the disk. F
 inally\, recent discoveries of irregular\, extended structures in CO emiss
 ion in several systems suggest that the planet formation environment may b
 e disrupted by exchange of material between disks and their surroundings. 
 Together\, these new data show that the natal environments of planets are 
 far more dynamic and diverse than earlier observations have indicated. 
LOCATION:ONLINE - Details to be sent by email
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