NOAO >   Observing Info >   Approved Programs >   2011B-0472

Small NOAO Logo

Proposal Information for 2011B-0472


PI: Tom Allen, University of Toledo, thomas.allen2@rockets.utoledo.edu
Address: Physics Department, 2801 West 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 Furesz, CfA
CoI: Scott Wolk, CfA
CoI: Fred Adams, University of Michigan
CoI: Rob Jefferies, University of Keele

Title: Hectochelle Spectroscopy of the Cep OB3b CLuster

Abstract: Using a combination of Spitzer, Chandra and ground-based measurements, we have recently performed a census of young stars in the Cep OB3b cluster. These data show that CepOB3b is one of the only two known 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 other known large young cluster within 1 Kpc, Orion Nebula Cluster, and thus can provide a rare glimpse of the evolution of young large clusters after most of the natal gas has been dispersed. The cluster is hierarchical in structure, with two large sub- clusters. We propose Hectochelle observations to measure the accretion properties and radial velocities of the member stars. This will allow us to analyze the dynamics of the emerging cluster, and to study the accretion properties of the evolving disks. These observations will provide a unique snapshot of a massive young cluster emerging from its natal cloud. This is a continuation of NOAO Proposals 2009B-0449 and 2010B-0436.


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-0472

noaoprop-help@noao.edu

Small NOAO Logo