NOAO >   Observing Info >   Approved Programs >   2009B-0549

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Proposal Information for 2009B-0549


PI: Tom Megeath, University of Toledo, megeath@physics.utoledo.edu
Address: Dept. of Physics and Astronomy, 2801 W. Bancroft St, Toledo, OH 43606, USA

CoI: Erin Allgaier, University of Toledo
CoI: Jouni Kainulainen, University of Helsninki soon to be at MPIA
CoI: Thomas Henning, MPIA
CoI: Lori Allen, NOAO

Title: NEWFIRM Extinction Mapping of the Orion Molecular Cloud

Abstract: The Orion molecular complex harbours the richest sample of protostars within 500 pc of the Sun, with over 400 protostars of all evolutionary classes identiļ¬ed with Spitzer. 279 protostars will be observed by the Herschel Orion Protostar Survey (HOPS) open time key program. HOPS, together with mid-infrared spectra and photometry from Spitzer and near-infrared high resolution imaging will allow the determination of the fundamental properties of the protostars. However, little information on the gas in the protostars parent molecular gas exists. There is an initial indication that column density is a major factor in determining the luminosity of protostars. We propose to investigate the gas column density through extremely deep imaging of background sources and measuring the extinction using H-K color excess of background stars and galaxies. In this proposal, we describe a pilot program to demonstrate that NEWFIRM can achieve the depth needed to map high column density gas surrounding protostars in Orion.


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



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