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SUMMARY:Dust radio continuum components at 1cm in protoplanetary disks - S
 imon Casassus (Universidad de Chile)
DTSTART:20181029T160000Z
DTEND:20181029T170000Z
UID:TALK112648@talks.cam.ac.uk
CONTACT:Richard Booth
DESCRIPTION:In the context of protoplanetary disk evolution\, the aerodyna
 mic coupling of dust and gas predicts the accumulation of the larger dust 
 grains in local pressure maxima.  The MWC758 disk is indeed one of the bes
 t examples for dust trapping in anticyclonic vortices\, where the pile up 
 of dust may lead to grain growth. Long wavelengths observations traces clu
 mpy distributions of large grains\, whose morphology can be linked to phys
 ical conditions. Yet\, new observations reveal a faint and extended compon
 ent at 1cm\, without counterparts in at 1mm. This radio continuum componen
 t may represent an excess microwave emission (EME)\, and could stem from s
 pinning dust radiation. This identification may open a new window on the v
 ery small grain population in protoplanetary disks\, and is important to s
 eparate genuine emission from the larger grains.
LOCATION:Martin Ryle Seminar Room\, Kavli Institute
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