Image Details
Caption: Figure 2.
Spectra of the Li I λ6707 resonance transition in all NGC 7789 red giants observed with the Tull Spectrograph (left panel) and of the He I λ10830 transition in all of this cluster’s stars observed with HET/HPF by Sneden et al. (2022; right panel). Attention is called to Li-rich stars 193 (in blue) and 301 (in red). All spectra of NGC 7789 giants observed with either instrument are shown in this figure.
© 2023. The Author(s). Published by the American Astronomical Society.