Pismis 2, a poorly studied, intermediate age open cluster
天体物理学
2009-11-07 v1
摘要
We present CCD BVI photometry of the intermediate age open cluster Pismis 2, covering from the brighter red giants to about 5 magnitudes below the main sequence turn-off. The cluster is heavily reddened and is possibly affected by a differential reddening of Delta E(B-V) ~= 0.04-0.06. Using the synthetic Colour - Magnitude Diagram method, we estimate in a self-consistent way distance modulus, (n-M)0 ~= 12.5-12.7, and age ~= 1.1-1.2 Gyr. The cluster probably contains a significant fraction of binary systems. The metallicity is most likely solar and the reddening E(B-V) ranges between 1.26 and 1.32 depending on the cluster region.
关键词
引用
@article{arxiv.astro-ph/0108335,
title = {Pismis 2, a poorly studied, intermediate age open cluster},
author = {L. Di Fabrizio and A. Bragaglia and M. Tosi and G. Marconi},
journal= {arXiv preprint arXiv:astro-ph/0108335},
year = {2009}
}
备注
10 pages, 11 figures, accepted for publication in MNRAS