Figure 7 from An Empirical Template Library for FGK and Late-type A Stars Using LAMOST Observed Spectra

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An Empirical Template Library for FGK and Late-type A Stars Using LAMOST Observed Spectra

Authors: Bing Du, A-Li Luo, F. Zuo, Z-R. Bai, R. Wang, Y-H. Song, W. Hou, Y-B. Li, J-N. Zhang, Y-X. Guo, J-J. Chen, M-X. Wang, Y-F. Wang, X. Kong, K-F. Wu, X. Wang, Y. Wu, Y.-H Hou, and Y-H. Zhao

2019 The Astrophysical Journal Supplement Series 240 10.

Provider: AAS Journals

Caption: Figure 7.

Metallicity variations for a range of temperatures, shown in two different wavelength regions. The left panel shows the region around the Ca II H and Ca II K lines (∼3940 Å), which are metallicity-sensitive for higher-temperature stars (∼6200–8500 K). The right panel shows the region around the Na I D lines (∼5900 Å), which is metallicity-sensitive for the spectral subclasses of around F through late K-type stars (∼3600–7000 K).

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