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SUMMARY:Kaleidoscope of irradiated disks: VLT/MUSE observations of proplyd
 s - Mari-Liis Aru
DTSTART:20250212T134000Z
DTEND:20250212T140500Z
UID:TALK228313@talks.cam.ac.uk
CONTACT:Xander Byrne
DESCRIPTION: The evolutionary pathways of protoplanetary disks differ depe
 nding on the surrounding environment. In massive star clusters\, UV radiat
 ion affects disks via external photoevaporative winds\, depleting the disk
 s of their material and shortening their lifetimes. Known as proplyds\, su
 ch irradiated disks are typically surrounded by a teardrop-shaped cloud of
  ionized gas and observed in forbidden emission lines.\n\nWhile external p
 hotoevaporation of disks is unique to clusters such as the Orion Nebula Cl
 uster (ONC)\, internal photoevaporative winds may be present in both high 
 UV environments\, and low-mass star forming regions with weak external UV 
 fields. In the latter case\, the winds arise due to radiation from the cen
 tral star and can also be studied via forbidden line emission. It is there
 fore crucial to determine how to disentangle external winds from internal 
 ones.\n\nI will present the results based on the visually striking VLT/MUS
 E IFU data of a dozen proplyds in the ONC. This sample allows us to study 
 the morphology of proplyds in a wealth of emission lines and determine the
 ir physical parameters. Among the results\, I will present a proxy for una
 mbiguously identifying externally driven winds with a forbidden line of ne
 utral atomic carbon.
LOCATION:The Hoyle Lecture Theatre + Zoom 
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