Y Gem, a symbiotic star outshone by its asymptotic giant branch primary component M. A. Guerrero, D. A. Vasquez-Torres, J. B. Rodríguez-González, J. A. Toalá and R. Ortiz A&A, 693 (2025) A203 Published online: 17 January 2025 DOI: 10.1051/0004-6361/202451715