NOAO >   Observing Info >   Approved Programs >   2004B-0234

Small NOAO Logo

Proposal Information for 2004B-0234


PI: Kurtis A. Williams, University of Arizona, kurtis@as.arizona.edu
Address: Steward Observatory, 933 N Cherry Ave, Tucson, AZ 85721, USA

CoI: Michael Bolte, UCO/Lick Observatory

Title: White dwarfs in open clusters: the initial final mass relation and supernova mass limit

Abstract: White dwarfs are excellent observational probes for determination the minimum mass of core-collapse supernova progenitors (\mcrit) and for determination of the initial-final mass relation (the relation between a progenitor star mass and the resultant WD mass). To date, the best estimates give \mcrit\gtrsim 6\msun, a limit based primarily on the single white dwarf in the Pleiades. The initial-final mass relation is known for only a few clusters, and it is unknown whether there is any intrinsic scatter or metallicity-dependence in the relation. We propose imaging of several young and intermediate-age open clusters in order to develop a large sample of white dwarfs to address these issues. \ubv imaging of young open clusters will be used to detect WDs in open clusters spanning a range of metallicities and ages to construct a sample of WDs suitable for exploring the initial-final mass relation and \mcrit. Shallow imaging of each cluster will be used to determine cluster ages, distances, extinction and metallicities, poorly-known quantities that are vital to interpretation of the WD samples. \emphThese data will complete the imaging phase of this project.


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 >   2004B-0234

noaoprop-help@noao.edu

Small NOAO Logo