NOAO >   Observing Info >   Approved Programs >   2010B-0436

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Proposal Information for 2010B-0436


PI: Tom Allen, University of Toledo, Thomas.Allen2@utoledo.edu
Address: Physics Department, 2801 W. Bancroft St, Toledo, OH 43606, USA

CoI: Tom Megeath, University of Toledo
CoI: Judy Pipher, University of Rochester
CoI: Rob Gutermuth, Smith College/UMass Amherst
CoI: Elaine Winston, University of Exeter
CoI: Tim Naylor, University of Exeter
CoI: Gabor Furecz, SAO
CoI: Scott Wolk, SAO
CoI: Fred Adams, University of Michigan
CoI: Rob Jeffries, University of Keele

Title: Hectospec and Hectochelle Spectroscopy of the Cep OB3b Cluster

Abstract: We have recently discovered over 1000 young stars in the Cep OB3b young cluster with the \it Spitzer Space Telescope; showing that CepOB3b is one of the two large (1000+ member), young (< 5 Myr), dense clusters within 1 Kpc of the Sun. It has largely dispersed its natal gas, suggesting it is more evolved than the Orion Nebula Cluster, and thus can provide a rare glimpse of the evolution of young large clusters. We have recently found that the stars in Cep OB3b closest to an O7V star preferentially lack disks, evidence that disk evaporation is ongoing in this cloud. We propose Hectospec and Hectochelle observations to measure the spectral types, accretion properties and radial velocities of the member stars. This will allow us to analyze the age and dynamics of the emerging cluster, and to study the photoevaporation of disks around stars orbiting in the cluster. These observations will also support 150 kiloseconds of Chandra Observations to study the X-ray properties of this young cluster. This is a continuation of NOAO Proposal 2009B-0449.


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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