PI: Colette Salyk, National Optical Astronomy Observatory, firstname.lastname@example.org
Address: 950 N Cherry Ave, Tucson, AZ 85719, USA
CoI: Ke Zhang, California Institute of Technology
CoI: Klaus M Pontoppidan, Space Telescope Science Institute
CoI: Geoffrey A Blake, California Institute of Technology
CoI: Matt Richter, University of California at Davis
CoI: John Lacy, University of Texas at Austin
Title: Where is the Water Vapor in Transition Disk DoAr 44?
Abstract: We propose to observe water vapor in the transition disk DoAr 44 using TEXES on Gemini North, and determine its location in the disk. Transition disks are protoplanetary disks with inner regions that have been at least partially cleared of small dust grains, and these clearings are believed to be formed via dynamical interaction with an embedded protoplanet (or planets). Water vapor is detected with the Spitzer-IRS in one such transition disk, while all other transition disks appear to be mostly `dry'. In this work, we propose to spectrally (or spatially) resolve the water vapor emission lines from this disk, DoAr 44, to determine where the water vapor lines originate. Then, using models of water vapor survival, we will place limits on the dust densities and gas/dust ratios in the emitting region, and better understand how any embedded planet is influencing its parent disk. We will also explore why this disk is water rich, while other transition disks are water poor, and consider any implications for the chemistry of planets forming in the disk.
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