A Survey of Open Clusters in the u'g'r'i'z' Filter System: III. Results for the Cluster NGC 188

Abstract

We continue our series of papers describing the results of a photometric survey of open star clusters, primarily in the southern hemisphere, taken in the u'g'r'i'z' filter system. The entire observed sample covered more than 100 clusters, but here we present data only on NGC 188, which is one of the oldest open clusters known in the Milky Way. We fit the Padova theoretical isochrones to our data. Assuming a solar metallicity for NGC 188, we find a distance of 1700+/-100 pc, an age of 7.5+/-0.7 Gyr, and a reddening E(B-V) of 0.025+/-0.005. This yields a distance modulus of 11.23+/-0.14.

41 pages, 8 figures. Accepted for publication in the Astronomical Journal

References in corpus (3)

• The 2.5 m Telescope of the Sloan Digital Sky Survey
• On the current status of open-cluster parameters
• Improved $u^{\prime }{g}^{\prime }{r}^{\prime }{i}^{\prime }{z}^{\prime }$ to $UBV{R}_C{I}_C$ Transformation Equations for Main Sequence Stars

Cited by in corpus (5)

• Galactic Globular and Open Clusters in the Sloan Digital Sky Survey. II. Test of Theoretical Stellar Isochrones
• The Swift UVOT Stars Survey: I. Methods and Test Clusters
• Bayesian Characterization of Main Sequence Binaries in the Old Open Cluster NGC 188
• Comprehensive Bayesian Modeling of Tidal Circularization in Open Cluster Binaries part I: M 35, NGC 6819, NGC 188
• Variable stars detection in the field of open cluster NGC 188