Fundamental parameters for 222 B-type stars for the X-shooter Spectral Library Article Swipe

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Cormac J. K. Larkin , Kristiina Verro , A. Gonneau , S. C. Trager ·

YOU? · · 2022 · Open Access · · DOI: https://doi.org/10.1017/s1743921322003258 · OA: W4402007833

We use the MIDE3700 code to find effective temperatures ( T eff ) and surface gravities (log g ) via the Barbier Chalonge Divan (BCD) method for 222 B-type stars in the ESO archive in preparation for their inclusion as an extension to the X-shooter Spectral Library (XSL). We find agreement of Δ log T eff ∼0.1σ and Δ log g ∼0.25σ of our results with a sample of literature stars. We populate a previously bare region of the XSL Kiel diagram in the ranges 9000 ≤ T eff ≤ 23000 K and 2.8 ≤ log g ≤ 4.0 dex, and thereby extend the lower age limit of XSL stellar population models by up to a factor ∼10 at [Fe/H] = −1.2 dex, and by a factor ∼2 at Solar metallicity.