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Table 2

Parameters of the sample stars.

Star Spectral T eff log g log gc V sini v mac C/H N/H O/H
type [kK] [km s-1] [km s-1] [10-4] [10-4] [10-4]

HD 104565 OC9.7 Iab 28 3.00 3.01 60 90 >2.0 2.0 >1.7
HD 152249 OC9 Iab 31 3.25 3.25 43 48 2.8 1.3 >7.0
HD 152424 OC9.2 Ia 29 3.10 3.11 60 90 2.0 0.9 >2.0
HD 154811 OC9.7 Ib 28 3.10 3.12 110 65 2.0 1.2 4.6

Notes. Uncertainties on Teff, log g, V sini, and vmac are ~1.5kK, 0.15 dex, 10, and 20 km s-1 respectively. loggc is the surface gravity corrected for centrifugal acceleration. Abundances are number ratios. Values for HD 152249 are from Martins et al. (2015a).

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