The open cluster NGC 6520 and the nearby dark molecular cloud Barnard 86

Abstract

Wide field BVI photometry and ${}^{12}$CO(1$\to$0) observations are presen ted in the region of the open cluster NGC 6520 and the dark molecular cloud Barnard~86. From the analysis of the optical data we find that the cluster is rather compact, with a radius of 1.0$\pm$0.5 arcmin, smaller than previous estimates. The cluster age is 150$\pm$50 Myr and the reddening E${}_{B-V}$=0.42$\pm$0.10. The distance from the Sun is estimated to be 1900$\pm$100 pc, and it is larger than previous estimates. We finally derive basic properties of the dark nebula Barnard 86 on the assumption that it lies at the same distance of the cluster.

21 pages, 8 eps figures (a few degraded in resolution), accepted for publication in the Astronomical Journal

References in corpus (7)

• New catalogue of optically visible open clusters and candidates
• A Robotic Wide-Angle H-Alpha Survey of the Southern Sky
• Enhanced cosmic-ray flux toward zeta Persei inferred from laboratory study of H3+ - e- recombination rate
• Star clusterings in the Carina complex: UBVRI photometry of Bochum 9, 10 and 11
• A multicolor CCD photometric study of the open clusters NGC 2866, Pismis 19, Westerlund 2, ESO96-SC04, NGC 5617 and NGC 6204
• Luminosity and mass functions of galactic open clusters: II. NGC 4852
• A photometric investigation of the young open cluster Trumpler 15

Cited by in corpus (2)

• Radial Velocities of Three Poorly Studied Clusters and the Kinematics of Open Clusters
• A New Look at Open Cluster NGC 6520