Pismis 2, a poorly studied, intermediate age open cluster

Details Pismis 2, a poorly studied, intermediate age open cluster Pismis 2, a poorly studied, intermediate age open cluster

2001-08-21

arxiv.org/abs/astro-ph/0108335v1

Mon.Not.Roy.Astron.Soc. 328 (2001) 795

Astronomy and Astrophysics

Astrophysics

10 pages, 11 figures, accepted for publication in MNRAS

Scientific paper

10.1046/j.1365-8711.2001.04900.x

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.

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