SIMBAD references

2003MNRAS.346..390P - Mon. Not. R. Astron. Soc., 346, 390-402 (2003/December-1)

Intermediate-age Galactic open clusters: fundamental parameters of NGC 2627.

PIATTI A.E., CLARIA J.J. and AHUMADA A.V.

Abstract (from CDS):

Charge-coupled device (CCD) photometry in the Johnson V, Kron-Cousins I and Washington CMT1systems is presented in the field of the poorly known open cluster NGC 2627. Four independent Washington abundance indices yield a mean cluster metallicity of [Fe/H]-0.12±0.08, which is compatible with the existence of a radial gradient in the Galactic disc. The resultant colour-magnitude diagrams indicate that the cluster is an intermediate-age object of 1.4 Gyr. Based on the best fits of the Geneva group's isochrones to the (V, V -I) and (T1, C -T1) diagrams, we estimate E (V -I) 0.25 ±0.05 and V -MV11.80±0.25 for logt 9.15, and E (C -T1) 0.23±0.07 and T1-MT111.85±0.25 for logt 9.10, respectively, assuming solar metal content. The derived reddening value E (C -T1) implies E (B -V) 0.12±0.07 and a distance from the Sun of 2.0±0.4 kpc. Using the WEBDA data base and the available literature, we re-examined the overall properties of all the open clusters with ages between 0.6 and 2.5 Gyr. We identified peaks of cluster formation at 0.7-0.8, 1.0-1.1, 1.6-1.7 and 2.0-2.1 Gyr, separated by relative quiescent epochs of ∼0.2-0.3 Gyr. We also estimated a radial abundance gradient of -0.08±0.02, which is consistent with the most recent determinations for the Galactic disc, but no clear evidence for a gradient perpendicular to the Galactic plane is found.

Abstract Copyright: 2003 RAS

Journal keyword(s): techniques: photometric - open clusters and associations: general - open clusters and associations: individual: NGC 2627

VizieR on-line data: <Available at CDS (J/MNRAS/346/390): table1.dat table2.dat table3.dat>

Nomenclature: Table 1: Cl* NGC 2627 PCA 1-NNNN (Nos 1-1 to 1-2534). Table 2: Cl* NGC 2627 PCA 2-NNNN (Nos 2-1 to 2-1734). Table 3: Cl* NGC 2627 PCAGC NN> (Nos 1-12).

CDS comments: Some identification numbers correspond to spurious detections.

Simbad objects: 2872

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