A Gaia based analysis of open cluster Berkeley 27

• Published in: arXiv.org 2022-09
• Main Authors: Sariya, Devesh P, Jiang, Ing-Guey, Bisht, D, Yadav, R K S, Rangwal, G
• Format: Article
• Language: English
• Subjects: Color-magnitude diagram; Galactic clusters; Metallicity
• ISSN: 2331-8422
• DOI: 10.48550/arxiv.2209.11072

In this paper, we have used the Gaia's Data Release-3 (DR3) data to study an intermediate-age open cluster Berkeley 27 (Be 27). A total of 131 most probable cluster members are picked within the cluster's radius based on the membership probability (\(> 80\%\)). The cluster's radius was estimated as 3.74 arcmin. The mean proper motion (PM) of Be 27 was determined to be (\(\mu_{\alpha} cos{\delta}\), \(\mu_{\delta}\))= (\(-1.076\pm0.008\), \(0.152\pm0.007\))~mas~yr\(^{-1}\). The blue straggler stars (BSS) of the cluster were found to be located in the central region. Theoretical isochrones of metallicity Z\(_{metal}\)= 0.008 were compared to the color-magnitude diagram (CMD) of Be 27. As a result, a heliocentric distance of 4.8\(\pm\)0.2 kpc and log (age) = 9.36\(\pm\)0.03 were determined for Be 27. The Galactic orbits are derived using the Galactic potential model which demonstrate that Be 27 follows a circular path around the Galactic center. The cluster does not seem to be affected much by the tidal forces from the Galactic thin disk.