Figure 4 from Confirming the Presence of Second-population Stars and the Iron Discrepancy along the AGB of the Globular Cluster NGC 6752

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Confirming the Presence of Second-population Stars and the Iron Discrepancy along the AGB of the Globular Cluster NGC 6752

Authors: A. Mucciarelli, E. Lapenna, C. Lardo, P. Bonifacio, F.R. Ferraro, and B. Lanzoni

2019 The Astrophysical Journal 870 124.

Provider: AAS Journals

Caption: Figure 4.

Comparison between the spectra of the AGB stars #44 and #65 (black and red line, respectively), in the spectral regions around the Na I doublet (upper panel) and the forbidden O I line (lower panel). Photometric and spectroscopic T_eff for the two targets are labeled in the upper panel.

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