How Protoplanetary Disks Disappear: The Nature of 'Transitional' Disks As Determined From The Spitzer Space Telescope

Details How Protoplanetary Disks Disappear: The Nature of 'Transitional' Disks As Determined From The Spitzer Space Telescope How Protoplanetary Disks Disappear: The Nature of 'Transitional' Disks As Determined From The Spitzer Space Telescope

Jan 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21534603c&link_type=abstract

American Astronomical Society, AAS Meeting #215, #346.03; Bulletin of the American Astronomical Society, Vol. 42, p.527

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Scientific paper

'Transitional' disks identify important final phases in protoplanetary disk evolution and gas giant planet formation. In this talk, I discuss new results on the morphologies and lifetimes of transitional disks based on Spitzer studies of Taurus, IC 348, NGC 2362, eta Cha and other 1--10 Myr old clusters. I find evidence for two transition disk morphologies and thus two separate pathways for protoplanetary disk evolution. Contrary to nearly two decades of widely accepted results, the transition disk lifetime is not short (0.01--0.1 Myr) but is an appreciable fraction of the total protoplanetary disk lifetime. I conclude by discussing the mechanisms plausibly responsible for transition disks and fruitful future programs to better constrain disk properties.

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