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Fig. 1


Hertzsprung-Russell diagram of all stars in the CRIRES-POP library. Logarithm of stellar luminosity in solar units is plotted against spectral type. Luminosities were taken from the literature, primarily McDonald et al. (2012), but also Anderson & Francis (2012), Jofré et al. (2015), and Newton et al. (2015). The data for several stars is somewhat uncertain; we found spectral type to be more homogeneous and reliable than the literature Teff determinations, and some published luminosities were at odds with the accepted luminosity class. In these few cases we have moved the star to a luminosity more representative of its accepted luminosity class. Hence this diagram is intended purely for illustrative purposes, to give a visual representation of the span of the CRIRES-POP library. Included in each CRIRES-POP atlas will be updated stellar properties, which will allow us to improve this diagram as results are published.

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