2MASS Near-IR Color-Magnitude Diagram of the Old Open Cluster King 11

Details 2MASS Near-IR Color-Magnitude Diagram of the Old Open Cluster King 11 2MASS Near-IR Color-Magnitude Diagram of the Old Open Cluster King 11

Feb 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011jkas...44...33k&link_type=abstract

Journal of the Korean Astronomical Society, vol. 44, no. 1, pp. 33-38

Astronomy and Astrophysics

Astronomy

Open Clusters And Associations: Individual (King 11), Galaxy: Stellar Content

Scientific paper

We study near-infrared properties of the old open cluster King 11, based on the 2MASS photometric data. We determine the location of the red giant clump(RGC) in the (K, J-K) color-magnitude diagram and derive the distance modulus of King 11 to be (m-M)_0 = 12.50±0.10 using the mean K magnitude of RGC. From the red giant branch slope - [Fe/H] relation we obtain the metallicity of this cluster, [Fe/H]=-0.17±0.07. The age and interstellar reddening of this cluster is estimated to be log t = 9.48±0.05, E(B-V)=0.90±0.03, by applying Padova isochrone fits to the data.

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