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SUMMARY:Are Protoplanetary Disks Truly Laminar?
DTSTART;VALUE=DATE-TIME:20200511T115000Z
DTEND;VALUE=DATE-TIME:20200511T121000Z
DTSTAMP;VALUE=DATE-TIME:20240704T115617Z
UID:indico-contribution-28@meetings.aip.de
DESCRIPTION:Speakers: Jacob Simon (Iowa State University)\nRecent years ha
 ve seen tremendous progress in our understanding of angular momentum trans
 port in protoplanetary disks.  It is now thought that accretion is driven 
 primarily by a large-scale vertical field threading the disk\, either thro
 ugh magnetically launched winds or large-scale magnetic stresses within th
 e disk plane.  However\, it remains an open question as to just how lamina
 r these accreting disks are.  Even if not the primary source of angular mo
 mentum transport\, turbulence may still play a crucial role in the multitu
 de of processes involved in forming planets. \n\nIn this talk\, I will pre
 sent both theoretical and observational evidence that protoplanetary disks
  are not necessarily laminar and in some cases can still harbor vigorous t
 urbulence.   From ALMA observations of molecular line broadening\, we now 
 know of at least one source that presents a clear signature of turbulence.
   I will present these compelling new observations and compare them to ear
 lier predictions of magnetically driven turbulence. I will also present a 
 number of numerical experiments that indeed show magnetically driven turbu
 lence is still present throughout large regions of the disk\, even in the 
 presence of a large-scale magnetic field.  I will conclude with an outlook
  for future observational and theoretical studies and what the results so 
 far imply for our understanding of planet formation and disk evolution.\n\
 nhttps://meetings.aip.de/event/1/contributions/28/
LOCATION:Leibniz Institute for Astrophysics Potsdam (AIP) Lecture Hall
URL:https://meetings.aip.de/event/1/contributions/28/
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