NOAO >   Observing Info >   Approved Programs >   2006A-0523

Small NOAO Logo

Proposal Information for 2006A-0523


PI: William Lee Powell Jr, Texas Tech University, William.L.Powell@ttu.edu
Address: Department of Physics, Campus Box 41051, Lubbock, TX 79409-1051, USA

CoI: Dr. Ronald Wilhelm, Texas Tech University

Title: An Observational Study of Globular Cluster Tidal Streams

Abstract: The existence of tidal streams surrounding globular clusters has been well established in the literature. These streams have been shown to consist of stars that have been tidally removed from the clusters as they move through their orbits in the Milky Way. Theoretical models and recent observations show that the most common stars in these streams are the least massive stars in the cluster. I propose using the 0.9m telescope to obtain photometry of carefully selected clusters and the area around these clusters, deep enough to include the faintest stars for which follow up spectroscopy can be obtained. I hope to map the extent of the tidal streams around these clusters photometrically and explore the luminosity and radial distribution function for the tails. Our results will provide a unique picture of the mechanisms that form these streams, and a better picture of the mass distribution in the clusters and our galaxy.


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 >   2006A-0523

noaoprop-help@noao.edu

Small NOAO Logo