UBVI photometry of the intermediate age open cluster NGC 6939

Abstract

We present CCD UBVI photometry of the nearby, intermediate age open cluster NGC 6939. Using the synthetic Colour - Magnitude Diagrams technique we estimate the following parameters: age between 1.3 and 1.0 Gyr (depending on whether or not overshooting is considered), reddening 0.34<E(B-V)<0.38 and distance modulus 11.3<mod_0<11.4 .

11 pages, 10 figs, MNRAS in press. Revised version correcting mistakes in comparison with Twarog et al. (1997) in Sections 1 and 5, kindly pointed out by B. Twarog

References in corpus (2)

• WIYN Open Cluster Study XVI: Optical/Infrared Photometry and Comparisons With Theoretical Isochrones
• Intermediate age open clusters: Collinder 110

Cited by in corpus (16)

• The Bologna Open Cluster Chemical Evolution (BOCCE) Project: midterm results from the photometric sample
• Zirconium, Barium, Lanthanum and Europium Abundances in Open Clusters
• Primordial Binary Evolution and Blue Stragglers
• OCCASO III. Iron peak and $\alpha$ elements of 18 open clusters. Comparison with chemical evolution models and field stars
• Interpreting the Colour-Magnitude Diagrams of Open Star Clusters through Numerical Simulations
• OCCASO II. Physical parameters and Fe abundances of Red Clump stars in 18 Open Clusters
• Berkeley 29, the most distant old open cluster
• Contact Binaries as Viable Distance Indicators: New, Competitive (V)JHKs Period-Luminosity Relations
• The Swift/UVOT Stars Survey. III. Photometry and Color-Magnitude Diagrams of 103 Galactic Open Clusters
• Blue Straggler Stars in Galactic Open Clusters and the Simple Stellar Population Model
• New Neutron-Capture Measurements in 23 Open Clusters. I. The R-Process
• UBVI CCD Photometry of the Old Open Cluster Berkeley 17
• A photometric and astrometric study of the open clusters NGC 1664 and NGC 6939
• Old open clusters and the Galactic metallicity gradient: Berkeley 20, Berkeley 66, and Tombaugh 2
• Radial velocities and membership of stars in the old, distant open cluster Berkeley 29
• Model-Independent Diagnostics of Highly Reddened Milky Way Star Clusters: Age Calibration