PI: Owen Boberg, Indiana U.,
Address: Astronomy Department, 727 E. 3rd Street, Bloomington, IN 47405 USA
CoI: Jeffrey Gerber, Indiana U.
CoI: Enrico Vesperini, Indiana U.
CoI: Michael M Briley, Appalachian State U.
CoI: Eileen Friel, Indiana U.
CoI: Katherine L Rhode, Indiana U.
Title: Pilot Project for the WIYN Indiana Northern Globular Cluster Survey: u'g'i' Imaging of Milky Way Globular Clusters
Abstract: Globular clusters are of vital importance to many areas of modern astrophysics research. Until recently, they were believed to be "simple stellar populations", systems composed of stars with the same age and initial chemical composition. The discovery that globular clusters actually contain multiple stellar populations, with different ages and abundances, has raised many fundamental questions concerning all aspects of the formation and dynamical evolution of these important objects. We will use the upgraded WIYN ODI camera to obtain deep imaging of three Galactic globular clusters (M71, M10, and M53) in the $u'g'i'$ filters. The goal is to detect and quantify the properties of the multiple stellar populations in the clusters out to very large radius. We will combine these observations with theoretical simulations and spectroscopic observations to investigate specific questions in multiple populations research, including investigating both the global fraction of the first- and second-generation stars in the clusters, and how that fraction varies with radius. With a wide-field $u'$-band filter now available for ODI, this observing run serves as a pilot study for the imaging portion of the larger WINGS study. Initial processing of the data obtained last year show that there could have been condensation on the ODI dewar window during the observing run. We are requesting additional time to redo critical observations of these clusters.
Program Type: ITAC
Run 1 (2017A): WIYN/ODI -- 1.5n on May 23 - May 24 2017
National Optical Astronomy Observatory, 950 North Cherry Avenue, P.O. Box 26732, Tucson, Arizona 85726, Phone: (520) 318-8000, Fax: (520) 318-8360