Fig. 2
Effects of stellar parameters on the Ca ii IRT lines. Shown here are PHOENIX spectra, degraded to the resolution of TIGRE spectra, with Teff varied in the top plot, log g in the middle, and metallicity in the bottom plot. Unless varied in that plot, stellar parameters were set to Teff = 5700 K, log g = 4.40 and [M / H] = 0.0.
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