The fractions of post-binary-interaction stars and evolved blue straggler stars on the red giant branch of globular clusters

The red giant branch (RGB) of globular clusters (GCs) is home to some exotic stars, which may provide clues on the formation multiple stellar populations in GCs. It well known that binary interactions are responsible for many stars. Thus, it important understand what fraction stars RGB GCs result interactions. In this paper, we performed a population synthesis study track number post-binary-interaction (post-BI) appear RGB, with particular emphasis evolved blue straggler (E-BSSs). Assuming an initial nearly 50%, find about half objects (called giants) underwent interactions, and E-BSSs account around 10% giants our standard simulation. We also compare properties post-BI from different channels. orbital period mass ratio distributions significantly affect giants. Our results imply non-standard non-negligible contribution GCs, should be considered future investigations origin populations.