Rotational velocities of blue straggler stars in the globular cluster M 55 A. Billi, F. R. Ferraro, A. Mucciarelli, B. Lanzoni, M. Cadelano and L. Monaco A&A, 690 (2024) A156 Published online: 02 October 2024 DOI: 10.1051/0004-6361/202450593