Spitzer/MIPS 24 micron Detection of Photoevaporating Protoplanetary Disks

Details Spitzer/MIPS 24 micron Detection of Photoevaporating Protoplanetary Disks Spitzer/MIPS 24 micron Detection of Photoevaporating Protoplanetary Disks

2006-08-29

arxiv.org/abs/astro-ph/0608630v1

Astrophys.J.650:L83-L86,2006

Astronomy and Astrophysics

Astrophysics

4 pages 4 figures. Accepted for publication in The Astrophysical Journal Letters

Scientific paper

10.1086/508707

We present 24 micron images of three protoplanetary disks being photoevaporated around high mass O type stars. These objects have ``cometary'' structure where the dust pulled away from the disk by the photoevaporating flow is forced away from the O star by photon pressure on the dust and heating and ionization of the gas. Models of the 24 micron and 8 micron brightness profiles agree with this hypothesis. These models show that the mass-loss rate needed to sustain such a configuration is in agreement with or somewhat less than the theoretical predictions for the photoevaporation process.

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