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SUMMARY:The Inner Regions of Protoplanetary Disks: 3D Radiation Magneto-Hy
 drodynamical Models
DTSTART;VALUE=DATE-TIME:20200512T091000Z
DTEND;VALUE=DATE-TIME:20200512T093000Z
DTSTAMP;VALUE=DATE-TIME:20240704T115618Z
UID:indico-contribution-34@meetings.aip.de
DESCRIPTION:Speakers: Mario Flock (MPIA)\nMany planets orbit within an AU 
 of their stars\, raising questions about their origins. Particularly puzzl
 ing are the planets found near the silicate sublimation front. We investig
 ate conditions near the front in the protostellar disk around a young inte
 rmediate-mass star\, using the first global 3-D radiation non-ideal MHD si
 mulations in this context.  \n\nThe results show magnetorotational turbule
 nce around the sublimation front at 0.5 AU.  Beyond 0.8 AU is the dead zon
 e\, cooler than 1000 K and with turbulence orders of magnitude weaker.  A 
 local pressure maximum just inside the dead zone concentrates solid partic
 les\, allowing for efficient growth.  Over many orbits\, a vortex develops
  at the dead zone's inner edge\, increasing the disk's thickness locally b
 y around 10%.\n\nWe synthetically observe the results using Monte Carlo tr
 ansfer calculations\, finding the sublimation front is bright in the near-
 infrared.  The models with vertical magnetic flux develop extended\, magne
 tically-supported atmospheres that reprocess extra starlight\, raising the
  near-infrared flux 20%.  The vortex throws a non-axisymmetric shadow on t
 he outer disk.  \n\nRadiation-MHD models of the kind we demonstrate open a
  new window for investigating protoplanetary disks' central regions.  They
  are ideally suited for exploring young planets' formation environment\, i
 nteractions with the disk\, and orbital migration\, in order to understand
  the origins of the close-in exoplanets.\n\nhttps://meetings.aip.de/event/
 1/contributions/34/
LOCATION:Leibniz Institute for Astrophysics Potsdam (AIP) Lecture Hall
URL:https://meetings.aip.de/event/1/contributions/34/
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