Sejong Open Cluster Survey. I. NGC 2353

Details Sejong Open Cluster Survey. I. NGC 2353 Sejong Open Cluster Survey. I. NGC 2353

2011-03-25

arxiv.org/abs/1103.4927v1

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

10 pages, 10 figures, accepted in JKAS - Journal of Korean Astronomical Society, 2011

Scientific paper

UBVI CCD photometry of NGC 2353 is obtained as part of the "Sejong Open cluster Survey" (SOS). Using the photometric membership criteria we selelct probable members of the cluster. We derive the reddening and distance to the cluster, i.e. E(B-V) = 0.10 +/- 0.02 mag and 1.17 +/- 0.04 kpc, respectively. We find that the projected distribution of the probable members on the sky is elliptical in shape rather than circular. The age of the cluster is estimated to be log(age)=8.1 +/- 0.1, older than what was found in previous studies. The minimum value of binary fraction is estimated to be about 48 +/- 5 percent from a Gaussian function fit to the distribution of the distance moduli of the photometric members. Finally, we also obtain the luminosity function and the initial mass function (IMF). The slope of the IMF is Gamma = -1.3 +/- 0.2.

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