Fig. 4
High-resolution normalized spectra of late G-, K-type stars: CORALIE spectra of the coolest stars in the sample (black), HARPS spectra (red) of cool stars from the HARPS database (e.g., Sousa et al. 2008) and the CORALIE spectrum (blue) of HD 53680, and the HARPS spectrum (blue) of HIP 103019. The spectra are depicted following a sequence with decreasing Tefffrom top to bottom.
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