No country for old stars - Spectroscopic confirmation of the first intermediate-age RR Lyrae in the open cluster Trumpler 5
V. D’Orazi, C. Mateu, G. Iorio, A. Bobrick, Z. Prudil, R. Salinas, A. Bragaglia, L. Mashonkina, R. G. Gratton, I. Ilyn, N. Alvarez Baena, V. F. Braga, A. Nunnari, V. M. Kalari, F. Cusano and S. Tosi
A&A, 708 (2026) L22
DOI: https://doi.org/10.1051/0004-6361/202660253
