The WIYN Open Cluster Study: Photometry of NGC 188

Details The WIYN Open Cluster Study: Photometry of NGC 188 The WIYN Open Cluster Study: Photometry of NGC 188

Dec 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997aas...191.8013v&link_type=abstract

American Astronomical Society, 191st AAS Meeting, #80.13; Bulletin of the American Astronomical Society, Vol. 29, p.1340

Astronomy and Astrophysics

Astronomy

Scientific paper

We report our results on the old ( ~ 6 Gyrs) open cluster NGC 188, obtained as part of the WIYN Open Cluster Study. We have obtained wide field photometry at the KPNO 0.9m telescope and deep photometry, to V >= 24, at the WIYN telescope. We present color magnitude diagrams spanning ~ 13 magnitudes in V, vastly improving upon previous, mostly photographic, work. We compare the observed kinks in the main sequence V versus V - I color magnitude diagram to globular clusters observations obtained with the Hubble Space Telescope. We also compare the luminosity function of NGC 188 to these same globular clusters. We use these comparisons to study the mass - luminosity relation and the initial mass function over 2 dex in metal abundance.

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