Table 1.
Atmospheric and stellar parameters of HD 93840.
| General information: | |||
|---|---|---|---|
| Sp. Type | BN1 Ib | ϖ (mas) (a) | 0.3604 ± 0.0348 |
| vrad (km s−1) | −8.1 ± 0.5 | μα (mas yr−1) (b) | −5.767 ± 0.03 |
| d (kpc) (c) | ∼2.6 to ∼2.8 | μδ (mas yr−1) (b) | 5.033 ± 0.03 |
| V (mag)(d) | 7.761 ± 0.013 | B − V (mag) (d) | −0.048 ± 0.008 |
| Stellar parameters and elemental abundances: | |||
| ADS(e) | FASTWIND(f) | TLUSTY(g) | |
| Teff (kK) | 21.8 ± 0.3 |
 |
20.9 ± 1.0 |
| log g (cgs) | 3.00 ± 0.05 |
 |
2.75 ± 0.2 |
| ξ (km s−1) | 13 ± 2 | 16 ± 3 | 15 ± 3 |
| v sin i (km s−1) | 68 ± 3 | 68 | 58 ± 3 |
| ζ (km s−1) | 65 ± 5 | 65 | 68 ± 4 |
| ε(He) |
 |
 |
... |
| ε(C) | 7.25 ± 0.09 |
 |
... |
| ε(N) | 8.59 ± 0.08 |
 |
8.37 ± 0.2 |
| ε(O) | 8.42 ± 0.05 |
 |
... |
| ε(Ne) | 8.10 ± 0.07 | ... | ... |
| ε(Mg) | 7.40 ± 0.05 |
 |
... |
| ε(Al) | 6.24 ± 0.08 | ... | ... |
| ε(Si) | 7.63 ± 0.08 |
 |
... |
| ε(S) | 7.32 ± 0.05 | ... | ... |
| ε(Ar) | 6.61 ± 0.08 | ... | ... |
| ε(Fe) | 7.33 ± 0.08 | ... | ... |
| Z | 0.011 ± 0.002 | ... | ... |
| RV | 2.9 ± 0.1 | 2.95 ± 0.35 | ... |
| E(B−V) (mag) | 0.21 ± 0.03 | 0.19 ± 0.02 | ... |
| MV (mag) | −4.82 to −5.20 | ... | |
| Mbol (mag) | −6.85 to −7.23 | ... | |
| M/M⊙ | 7.8 to 11.0 | 23 ± 5 | |
| R/R⊙ | 14 to 17 | ... | |
| log L/L⊙ | 4.63 to 4.79 | ... | |
| log τ/yr | > 7.10 | ... | |
Notes. Uncertainties are 1σ-standard deviations, except where noted otherwise.
Accounting for magnitude-dependent systematics of Gaia EDR3 data according to Cantat-Gaudin & Brandt (2021).
Most likely full range, see Appendix B.
Fraser et al. (2010). For the fundamental parameters full ranges based on the likely distance interval are given.
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