NOAO >   Observing Info >   Approved Programs >   2011B-0133

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Proposal Information for 2011B-0133


PI: Lori Allen, NOAO, lallen@noao.edu
Address: n/a, 950 N. Cherry Ave, Tucson, AZ 85719, USA

CoI: Tom Megeath, University of Toledo
CoI: John Tobin, University of Michigan
CoI: Charles Poteet, University of Toledo
CoI: Will Fischer, University of Toledo
CoI: Lee Hartmann, University of Michigan
CoI: Nuria Calvet, University of Michigan

Title: High Resolution Imaging of Orion protostars

Abstract: We propose a continuation of WHIRC/WTTM imaging to resolve scattered light emission from 80 protostars in Orion. These observations are part of an unprecedented multi-wavelength study of 300 protostars in the Orion molecular cloud complex; the largest population of protostars within 500 pc of the Sun. The protostars are being studied with a combination of far-IR imaging and spectroscopy with Herschel, mid-IR imaging and spectroscopy with Spitzer, and ground-based observations from near-IR through submillimeter and millimeter wavelengths. High resolution near-IR imaging plays a critical role by detecting and resolving light scattered in the infalling protostellar envelope, thus providing the only direct observations of the morphology of the inner envelope, the opening angle of outflows carved by winds, and the inclination of the source. Binaries can also be detected and resolved. Near-IR imaging provides critical information needed to model the SEDs and obtain the fundamental protostar properties such as infall rate, angular momentum and luminosity. The combined multi-wavelength observations will produce a comprehensive data set for guiding and testing theories of protostellar evolution and for understanding the role of environment in protostellar 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 >   2011B-0133

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