Discovery of a barium blue straggler star in M67 and sighting of its WD companion*

Harshit Pal, Annapurni Subramaniam, Arumalla B. S. Reddy +1

We report the discovery of a barium blue straggler star (BSS) in M67, exhibiting enhancements in slow neutron-capture ($s$-) process elements. Spectroscopic analysis of two BSSs (W…