Pismis 2, a poorly studied, intermediate age open cluster

Abstract

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.

10 pages, 11 figures, accepted for publication in MNRAS

References in corpus (4)

• Homogeneous Photometry for Star Clusters and Resolved Galaxies. II. Photometric Standard Stars
• Metal Abundances of Red Clump Stars in Open Clusters: I. NGC 6819
• Intermediate mass stars: updated models
• The intermediate age open cluster NGC 2660

Cited by in corpus (5)

• The Bologna Open Cluster Chemical Evolution (BOCCE) Project: midterm results from the photometric sample
• Berkeley 29, the most distant old open cluster
• UBVI photometry of the intermediate age open cluster NGC 6939
• Intermediate age open clusters: Collinder 110
• Berkeley 22, an old and distant open cluster towards the Galactic anticentre