Binarity and dynamics of open clusters

Main Colloquium
Dr. Vikrant Jadhav

Binary stars play a vital role in astrophysical research, as the majority of stars are in binaries. I will discuss the photometric identification of binaries in open clusters along with their cluster membership. The binary fraction of open clusters ranges from 0.2 to 0.6 and it varies with the mass of the primary stars. I will summarise a few studies focused on the evolution and detection of peculiar binary products such as blue stragglers and blue lurkers using Gaia and UVIT data. I plan to also present our ongoing work regarding the cluster dynamics, specifically signatures of rotation and expansion in open clusters.