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Chemical Compositions Of Red Giant Stars in the Old Open Cluster NGC 7789

  • Authors: Neel Nagarajan, Christopher Sneden, Melike Afşar, Catherine A. Pilachowski

Neel Nagarajan et al 2023 The Astronomical Journal 165 .

  • Provider: AAS Journals

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.

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