CCD photometry of the old open cluster Collinder 261

Abstract

We present UBVI photometry for the old open cluster Collinder 261. From comparison of the observed colour-magnitude diagrams with simulations based on stellar evolutionary models we derive in a self consistent way reddening, distance, and age of the cluster: E(B-V)=0.25$-$0.34, (m-M)${}_0$=11.7-12.0, and age=7$-$8 Gyr or 9$-$11 Gyr, depending on the adopted stellar tracks. The models in better agreement with the data turn out to have metallicity at most solar.

11 pages, plain tex, plus 7 .ps figures, accepted by MNRAS

Cited by in corpus (18)

• Chemical Homogeneity in Collinder 261 and Implications for Chemical Tagging
• The Bologna Open Cluster Chemical Evolution (BOCCE) Project: midterm results from the photometric sample
• On the metallicity of open clusters II. Spectroscopy
• Open clusters as key tracers of Galactic chemical evolution. III. Element abundances in Berkeley 20, Berkeley 29, Collinder 261, and Melotte 66
• New insights on Ba over-abundance in open clusters. Evidence for the intermediate neutron-capture process at play?
• High-resolution spectroscopy of the old open cluster Collinder 261:abundances of Iron and other elements
• uvbyCaHbeta CCD Photometry of Clusters. III. The Most Metal-Rich Open Cluster, NGC 6253
• C, N, O abundances and carbon isotope ratios in evolved stars of the open clusters Collinder 261 and NGC 6253
• Contact Binaries as Viable Distance Indicators: New, Competitive (V)JHKs Period-Luminosity Relations
• The intermediate age open cluster NGC 2660
• The extent of mixing in stellar interiors: the open clusters Collinder 261 and Melotte 66
• UBVI CCD Photometry of the Old Open Cluster Berkeley 17
• Radial Velocities of Three Poorly Studied Clusters and the Kinematics of Open Clusters
• Determination of dynamical ages of open clusters through the A${}^{+}$ parameter -- I
• The X-ray Emissivity of Low-Density Stellar Populations
• A study of the blue straggler population of the old open cluster Collinder 261
• NGC 4337: an over-looked old cluster in the inner disc of the Milky Way
• A Chandra X-ray census of the interacting binaries in old open clusters - Collinder 261