PI: Jeffrey Gerber, Indiana U., firstname.lastname@example.org
Address: Astronomy Department, 727 E. 3rd Street, Bloomington, IN 47405 United States
CoI: Eileen Friel, Indiana U.
CoI: Enrico Vesperini, Indiana U.
CoI: Michael M Briley, Appalachian State U.
CoI: Katherine L Rhode, Indiana U.
CoI: Nicholas Barth, Indiana U.
Title: Pilot Project for the WIYN Indiana Northern Globular Cluster Survey: Low and High Resolution Spectroscopy of Milky Way Globular Clusters
Abstract: Globular clusters in the Milky Way are not simple stellar populations, but rather contain the products of multiple epochs of star formation. The discovery of multiple stellar populations in globular clusters, as revealed by both photometric and spectroscopic studies, has raised fundamental questions concerning all aspects of their formation and dynamical evolution. Accurately measuring the properties of Milky Way globular clusters is necessary to address these questions. We plan to increase the number of stars from clusters observed as part of the successful first pilot study of a comprehensive spectroscopic survey of a sample of Milky Way globular clusters to thoroughly quantify the properties of clusters and their stellar populations (WINGS). This observing run will focus on mapping the behavior of CN band strengths which are known to differ between globular cluster generations using low resolution spectroscopic observations of large samples of evolved stars with Hydra. We will also make a second run using high resolution spectroscopic observations of the same stars to make precise velocity measurements, which will provide information about the kinematics of the populations in each cluster and the rotation of the cluster itself.
Program Type: ITAC
Run 1 (2017A): WIYN/HYDR -- 4n on May 29 - Jun 01 2017
Run 2 (2017A): WIYN/HYDR -- 3n on Jun 11 - Jun 13 2017
National Optical Astronomy Observatory, 950 North Cherry Avenue, P.O. Box 26732, Tucson, Arizona 85726, Phone: (520) 318-8000, Fax: (520) 318-8360