Table 1
Stellar parameters determined for β CMa and ϵ CMa.
| β CMa | ϵ CMa | |
|
|
||
| Sp. type | B1 II/III | B1.5 II |
| V [mag] | 1.97 | 1.50 |
| dHIP [pc] | 151 ± 5 | 124 ± 2 |
| log L/L⊙ | 4.41 ± 0.06 | 4.35 ± 0.05 |
| log LX/Lbol | −7.5 | −7.6 |
|
|
||
| Teff [K] | 24 700 ± 300 | 22 500 ± 300 |
| log g [cgs] | 3.78 ± 0.08 | 3.40 ± 0.08 |
| υmic [km s-1] | 8 ± 1 | 8 ± 1 |
| υeqsini [km s-1] | 20.3 ± 7.1 | 21.2 ± 2.2 |
| υmacro [km s-1] | 41.2 ± 4.2 | 46.7 ± 2.0 |
|
|
||
| log n(C) | 8.32 ± 0.07 | 8.30 ± 0.07 |
| log n(N) | 7.75 ± 0.09 | 8.16 ± 0.07 |
| log n(O) | 8.73 ± 0.11 | 8.70 ± 0.12 |
|
|
||
| G13 | ||
| M [M⊙] |
|
|
| R [R⊙] |
|
|
| τ [Myr] |
|
|
|
|
||
| B11 | ||
| M [M⊙] |
|
12.0 ± 0.4 |
| R [R⊙] |
|
|
| τ [Myr] | 12.2 ± 0.5 |
|
Notes. Uncertainties are 1σ-values. The υeqsini value given for β CMa is that obtained from the analysis of the Si iii 4567 Å line with the FT method. The last six lines list the stellar parameters mass, radius, and age obtained adopting the evolutionary models by Georgy et al. (2013) – G13 and Brott et al. (2011) – B11.
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