UBVI photometry of the intermediate age open cluster NGC 6939
Astrophysics
2009-11-10 v2
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 .
Cite
@article{arxiv.astro-ph/0311249,
title = {UBVI photometry of the intermediate age open cluster NGC 6939},
author = {Gloria Andreuzzi and Angela Bragaglia and Monica Tosi and Gianni Marconi},
journal= {arXiv preprint arXiv:astro-ph/0311249},
year = {2009}
}
Comments
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