Table 1.
Summary of spectroscopic and fundamental parameters resulting from the quantitative spectroscopic analysis of the late-B star in the LB-1 system.
| Spectroscopic parameters | Fundamental parameters | Surface abundances (LB-1) | Ref. abund. | ||||
|---|---|---|---|---|---|---|---|
| Teff = 14 000 ± 500 | [K] | R = 5.3 ± 1.2 | [R⊙] | ϵ(Si) = 7.20 ± 0.15 | [dex] | 7.50 ± 0.06 | [dex] |
| log g = 3.5 ± 0.15 | [dex] | log (L/L⊙) = 2.98 ± 0.21 | [dex] | ϵ(Mg) = 6.87 ± 0.15 | [dex] | 7.57 ± 0.06 | [dex] |
| v sin i = < 10 | [km s−1] |  |
[M⊙] | ϵ(C) = 7.50 ± 0.2 | [dex] | 8.35 ± 0.03 | [dex] |
| YHe = 0.1 |  |
[M⊙] | ϵ(N) = 8.20 ± 0.15 | [dex] | 7.82 ± 0.07 | [dex] | |
Notes. Stellar radius, luminosity, and spectroscopic mass were computed assuming a distance to the star d = 2.2 ± 0.5 kpc, and an extinction AV = 1.503 ± 0.027 mag. Evolutionary mass was obtained with BONNSAI (Schneider et al. 2014) using Teff, log g, and log L as input parameters. Abundances were obtained assuming fixed values of Teff (14 000 K), log g (3.5 dex), helium abundance (NHe/NH = 0.1), and microturbulence (1 km s−1). The last column refers to the abundances derived in B-type stars in the Orion OB1 association (Nieva & Simón-Díaz 2011), which can be considered as the present-day abundances of the solar neighborhood up to a few kpc.
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