Technetium-rich M Stars: Prime diagnostics of recent third dredge-up events on the Asymptotic Giant Branch

Shreeya Shetye, Sophie Van Eck, Alain Jorissen +6

Context. Technetium (Tc)-rich M-type stars have been known for over 45 years. However, the origin of Tc in these stars, particularly its detection without the concomitant detection…