Chemodynamical Study and Evidence for Hot Compact Companions to Blue Straggler Stars in Berkeley 31

Deniz Cennet Çınar, D. Bisht, Ing-Guey Jiang +2

We present a detailed study of the open cluster Berkeley 31 using Gaia DR3 astrometry, Gaia-ESO Survey DR5.1 spectroscopy, and multi-wavelength photometry. We identify 329 probable…