Fig. 5.
Surface gravities as function of Teff. Top panel: standard results, with [He/C], Teff, and log g as variables. Middle panel: [H/C] = −2.0 and [He/C] = −1.50 fixed, only photometry is used to determine Teff and log g. Bottom panel: results after iterating between log g from photometry and Teff from spectra, with [H/C] and [He/C] fixed as above.
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