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SUMMARY:Winds in transition disks
DTSTART;VALUE=DATE-TIME:20200515T093500Z
DTEND;VALUE=DATE-TIME:20200515T095500Z
DTSTAMP;VALUE=DATE-TIME:20240704T115620Z
UID:indico-contribution-61@meetings.aip.de
DESCRIPTION:Speakers: Étienne Martel (IPAG)\nProtoplanetary disks (PPD) h
 ave been widely observed around young stars and are supposed to host plane
 tary formation. Among these disks stand the transition disks (TD) which ar
 e characterized by a large hole in the central regions\, whose formation r
 emains yet unexplained. Despite this hole\, accretion rates comparable to 
 the ones found in PPD are measured\, suggesting an inward motion of matter
 .\n\nA possible explanation for these high accretion rates is the presence
  of magnetised winds that would allow matter to fall onto the star at high
  radial velocity. Following previous works\, the disk can be described usi
 ng non ideal MHD while the ideal MHD picture is used to compute the wind.\
 n\nI will show the impact of the depleted dust repartition in TDs on the i
 onization fraction through theoretical calculations based on a simple latt
 ice of chemical reactions. It can be shown that the non ideal MHD effects 
 are also affected by such a hole.  I will then present the results of 2D s
 imulations modelling winds in a TD based on the predicted non ideal effect
 s profiles.\n\nAxisymetry allows to explore the parameters space and to ch
 eck the stability of the hole profile through time. Such a work will later
  on lead the way to a more accurate description of the chemistry at stake 
 in TD and 3D simulations.\n\nhttps://meetings.aip.de/event/1/contributions
 /61/
LOCATION:Leibniz Institute for Astrophysics Potsdam (AIP) Lecture Hall
URL:https://meetings.aip.de/event/1/contributions/61/
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