Table 4
Orbital and physical parameters derived for the best-fit Keplerian model of KIC 4931738, along with fundamental parameters and detailed abundances.
| Parameter | KIC 4931738 A | KIC 4931738 B | |||||||
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| From fitting synthetic spectra | |||||||||
|
|
|||||||||
| P (days) | 14.197 ± 0.002 | ||||||||
| T0 (BJD) | 2 456 059.904 ± 0.015 | ||||||||
| e | 0.191 ± 0.001 | ||||||||
| ω (°) | 45.580 ± 0.283 | ||||||||
| γ (km s-1) | 12.241 ± 0.070 | ||||||||
| K (km s-1) | −62.717± 0.476 | 83.941± 0.067 | |||||||
| σO − C (km s-1) | 2.998 | 0.301 | |||||||
| ℳsin3iorb (ℳ⊙) | 2.511± 0.022 | 1.876± 0.029 | |||||||
| asiniorb (R⊙) | 17.275± 0.134 | 23.121± 0.022 | |||||||
| q | 0.747 ± 0.018 | ||||||||
|
|
|||||||||
| From spectral disentangling | |||||||||
|
|
|||||||||
| T0 (BJD) | 2 456 059.910 ± 0.029 | ||||||||
| e | 0.190 ± 0.004 | ||||||||
| ω (°) | 45.651 ± 0.750 | ||||||||
| K (km s-1) | −62.547± 0.431 | 84.174± 0.506 | |||||||
|
|
|||||||||
| Initial estimate from restricted fitting | |||||||||
|
|
|||||||||
| Teff (K) | 14 750± 1000 | 10 750± 1000 | |||||||
| log g (cgs) | 4.0± 0.5 | 4.5± 0.5 | |||||||
| log Z/Z⊙ | 0.0± 0.5 | 0.0± 0.5 | |||||||
| vsinirot (km s-1) | 9± 2 | 9± 4 | |||||||
|
|
|||||||||
| Analysis of disentangled spectra | |||||||||
|
|
|||||||||
| Teff (K) | 13 730± 200 | 11 370± 250 | |||||||
| log g (cgs) | 3.97± 0.05 | 4.37± 0.10 | |||||||
| log Z/Z⊙ | −0.24± 0.10 | +0.10± 0.10 | |||||||
| vsinirot (km s-1) | 10.5± 1.0 | 6.6± 1.0 | |||||||
| ξt (km s-1) | 2.0 (fixed) | 2.0 (fixed) | |||||||
| Spectral typea | B6 V | B8.5 V | |||||||
|
|
|||||||||
| He | [−1.11] | +0.10± 0.10 | +0.00± 0.10 | ||||||
| Fe | [−4.59] | −0.33± 0.10 | +0.15± 0.10 | ||||||
| Mg | [−4.51] | +0.00± 0.12 | −0.08± 0.20 | ||||||
| Si | [−4.53] | −0.30± 0.15 | +0.15± 0.20 | ||||||
| Ti | [−7.14] | −0.40± 0.35 | −0.10± 0.20 | ||||||
| Cr | [−6.40] | −0.30± 0.35 | +0.00± 0.25 | ||||||
Notes.All abundances are given in units of log (N/Ntot), relative to the solar values listed by Asplund et al. (2005) which are also indicated in parentheses after each element. The mass ratio is defined as q = ℳB/ℳA.
Spectral type have been determined based on Teff and log g values by using an interpolation in the tables given by Schmidt-Kaler (1982).
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