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SUMMARY:Dead zones in protoplanetary disks - Sano\, T (Osaka)
DTSTART:20090817T145000Z
DTEND:20090817T151000Z
UID:TALK19501@talks.cam.ac.uk
CONTACT:Mustapha Amrani
DESCRIPTION:MHD turbulence driven by the magnetoroational instability (MRI
 ) is the most promising mechanism of angular momentum transport in accreti
 on disks. However protoplanetary disks are dense and cold so that the ioni
 zation fraction is extremely low. It is known that there must be dead zone
 s in protoplanetary disks where the growth of MRI is suppressed significan
 tly due to non-ideal MHD effects. The size of dead zones are related to th
 e characteristics of dust grains. The gas and dust evolutions\, or planet 
 formation\, are affected by the existence of the dead zones. The roles of 
 the dead zones in planet formation scenario are summarized in this talk.
LOCATION:Seminar Room 1 Newton Institute
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