Fig. 15
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X-shooter spectra of Cepheid variables around 1318 nm (left panels) and 1527 nm (right panels) taken from Chen et al. (2014) and Minniti et al. (2020). Reddening increases downwards. (A) HD 052973, E(B – V) = 0.04, EW(1318 nm)=368±30mÅ, and EW(1527 nm)=450±50mÅ. (B) HD 101602, E(B – V) = 0.25, EW(1318 nm)=419±30, and EW(1527 nm)=840±50mÅ. (C) HD 178287, E(B – V) = 0.40, EW(1318 nm)=470 ±20mÅ, and EW(1527 nm)=570±60mÅ. (D) HD 179315, E(B – V) = 0.59, EW(1318 nm)=691 ±50 mÅ, and EW(1527 nm)=890±70mÅ. (E) HD 139717, E(B – V) Å 0.89, EW(1318 nm)=913±30mÅ, and EW(1527 nm)=2300±600mÅ. (F) B19, E(B – V) = 3.27, EW(1318 nm)=2300 ±250mÅ, and EW(1527 nm)=1400±300mÅ. (G) D20, E(B – V) = 3.57, EW(1318 nm)=2120±110mÅ, and EW(1527 nm)=3300±100mÅ.
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