BV photometry of a possible open star cluster pair NGC 7031/NGC 7086

Abstract

We present a CCD BV photometry of the possible binary open star cluster NGC 7031/NGC 7086. The aim is to confirm or disprove their common nature on the grounds of their age and distance. An age of 224 $\pm$ 25 Myr and distance 831 $\pm$ 72 pc was determined for NGC 7031 and 178 $\pm$ 25 Myr, 955 $\pm$ 84 pc for NGC 7086, respectively. Based on these differences in age and distance we conclude that the two clusters are most likely not formed together from one and the same Giant Molecular Cloud and thus are not a true binary cluster.

arXiv comment4 pages, 6 figures, accepted for publication by AN

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• New catalogue of optically visible open clusters and candidates
• Astrophysical parameters of Galactic open clusters
• Structural parameters of 11 faint Galactic globular clusters derived with 2MASS
• The evolution of binary star clusters and the nature of NGC2136/NGC2137
• Morphologies and ages of star cluster pairs and multiplets in the Small Magellanic Cloud

Cited by in corpus (2)

• Binary open clusters in the Milky Way: photometric and spectroscopic analysis of NGC 5617 and Trumpler 22
• CCD UBV photometric and Gaia astrometric study of eight open clusters- ASCC 115, Collinder 421, NGC 6793, NGC 7031, NGC 7039, NGC 7086, Roslund 1 and Stock 21