NOAO >   Observing Info >   Approved Programs >   2012A-0435

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Proposal Information for 2012A-0435


PI: John Tobin, National Radio Astronomy Observatory, jtobin@nrao.edu
Address: North American ALMA Science Center, 520 Edgemont Rd, Charlottesville, VA 22902

CoI: S. Tom Megeath, University of Toledo
CoI: Barbara Whitney, Space Science Institute
CoI: Hector Arce, Yale University
CoI: Lee Hartmann, University of Michigan
CoI: Lori Allen, NOAO
CoI: Will Fischer, University of Toldeo

Title: Probing the Youngest Proto-Planetary Disks: Mid-Infrared Scattered Light Imaging at High Resolution

Abstract: We propose high-resolution imaging in the mid-infrared (L^\prime and N-bands) of nearby, young protostars (D \le 300 pc) still embedded within their natal clouds, using the Gemini-North and South telescopes. Observations in the mid-infrared will enable us to resolve the structure of young proto-planetary disks via scattered light, by peering through the dense clouds of gas and dust that obscure most emission shortward of 3(mu)m. These observations will enable us to better understand protostar and proto-planetary disk formation by providing constraints on the vertical and radial structure of disks around the youngest protostars, complementing studies of dust emission in the sub/millimeter. The scattered light images are found to trace more extended, tenuous material as compared with sub/millimeter imaging in previous L^\prime-band observations of the protostar L1527. The disks will be modeled with a Monte Carlo radiative transfer code to constrain the physical parameters; the radii and vertical structures of these young disks mark the starting point for disk evolution.


National Optical Astronomy Observatory, 950 North Cherry Avenue, P.O. Box 26732, Tucson, Arizona 85726, Phone: (520) 318-8000, Fax: (520) 318-8360



NOAO >   Observing Info >   Approved Programs >   2012A-0435

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