WIYN Open Cluster Study: Observational Constraints of Stellar Evolution Models
American Astronomical Society, AAS Meeting #213, #407.08; Bulletin of the American Astronomical Society, Vol. 41, p.203
Published in Jan 2009
As studies of Galactic stellar populations begin to move toward the infrared, the reliability of stellar models using these observation needs to be examined. One complication with using star clusters as population tracers is that many studies are derived utilizing a variety of filter systems. Additionally, the comparison of these clusters to evolution models (i.e., isochrones) is non-uniform as many different models are used and that some of these ''systems'' of isochrones also have evolved over time. Therefore, we have begun testing the major families of isochrones, across 17 photometric bands against the core WOCS clusters (NGC 188, M35, M67, NGC 6819). We present the first test of stellar models utilizing the membership cleaned WOCS data set for NGC 188, which includes optical(UBVRI & u'g'r'i'z'), near-infrared (JHK_S), and mid-infrared Spitzer IRAC ([3.6][4.5][5.8][8.0]) photometry.