Open clusters in the Kepler field. II. NGC 6866

Journal Article · Sun Jun 01 04:00:00 EDT 2014 · Astronomical Journal (New York, N.Y. Online)

DOI:https://doi.org/10.1088/0004-6256/147/6/139· OSTI ID:22340239

Janes, Kenneth; Hoq, Sadia ^[1]; Barnes, Sydney A. ^[2]; Meibom, Søren ^[3]

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1. Astronomy Department, Boston University, Boston, MA 02215 (United States)
2. Leibniz-Institute for Astrophysics, Potsdam (Germany)
3. Harvard-Smithsonian Center for Astrophysics, 60 Garden St., Cambridge, MA 02138 (United States)

We have developed a maximum-likelihood procedure to fit theoretical isochrones to the observed cluster color-magnitude diagrams of NGC 6866, an open cluster in the Kepler spacecraft field of view. The Markov chain Monte Carlo algorithm permits exploration of the entire parameter space of a set of isochrones to find both the best solution and the statistical uncertainties. For clusters in the age range of NGC 6866 with few, if any, red giant members, a purely photometric determination of the cluster properties is not well-constrained. Nevertheless, based on our UBVRI photometry alone, we have derived the distance, reddening, age, and metallicity of the cluster and established estimates for the binary nature and membership probability of individual stars. We derive the following values for the cluster properties: (m – M) {sub V} = 10.98 ± 0.24, E(B – V) = 0.16 ± 0.04 (so the distance = 1250 pc), age =705 ± 170 Myr, and Z = 0.014 ± 0.005.

• OSTI ID: 22340239
• Journal Information: Astronomical Journal (New York, N.Y. Online), Journal Name: Astronomical Journal (New York, N.Y. Online) Journal Issue: 6 Vol. 147; ISSN 1538-3881
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
ALGORITHMS
DATA ANALYSIS
DIAGRAMS
DISTANCE
EXPLORATION
MARKOV PROCESS
MAXIMUM-LIKELIHOOD FIT
METALLICITY
MONTE CARLO METHOD
PHOTOMETRY
SPACE
STAR CLUSTERS
STARS