SIMBAD references

2005AJ....129..872A - Astron. J., 129, 872-887 (2005/February-0)

uvbyCaHβ CCD photometry of clusters. V. The metal-deficient open cluster NGC 2243.

ANTHONY-TWAROG B.J., ATWELL J. and TWAROG B.A.

Abstract (from CDS):

CCD photometry on the intermediate-band uvbyCaHβ system is presented for the metal-deficient open cluster NGC 2243. Restricting the data to probable single members of the cluster using the color-magnitude diagram (CMD) and the photometric indices alone generates a sample of 100 stars at the cluster turnoff. The average E(b-y)=0.039±0.003 (s.e.m.) or E(B-V)=0.055±0.004 (s.e.m.), where the errors refer to internal errors alone. With this reddening, [Fe/H] is derived from both m1and hk, using b-y and Hβ as the temperature index. The agreement among the four approaches is excellent, leading to a final weighted average of [Fe/H]=-0.57±0.03 (s.e.m.) for the cluster, on a scale where the Hyades has [Fe/H]=+0.12. Using a combination of photometric and spectroscopic data, 27 probable cluster members are identified and used to delineate the red giant branch and a well-defined clump at V=13.70, while eliminating the so-called second clump at V=14.1. Interpolation between isochrones of appropriate [Fe/H] leads to an apparent modulus of m-M=13.15±0.1 and an age of 3.8±0.2 Gyr. A differential CMD comparison with Ber 29, a cluster with a galactocentric distance almost twice that of NGC 2243, constrains Ber 29 to be at least as young and as metal-rich as NGC 2243.

Abstract Copyright:

Journal keyword(s): Stars: Color-Magnitude Diagrams - Galaxy: Open Clusters and Associations: Individual: NGC Number: NGC 2243 - Galaxy: Open Clusters and Associations: Individual: Name: Berkeley 29 - Galaxy: Open Clusters and Associations: Individual: Name: Berkeley 54

VizieR on-line data: <Available at CDS (J/AJ/129/872): table1.dat>

Nomenclature: Table 1: Cl* NGC 2243 AAT NNNNN N=1266

Status at CDS : All or part of tables of objects could be ingested in SIMBAD with priority 2. // All or part of tables of objects will not be ingested in SIMBAD.

Simbad objects: 25

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