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Table 4

Main orbital and spectral properties of all wide sdB binary systems of which the orbits are solved.

PG 1018–047 PG 1449+653 PG 1701+359 PG 1104+243 BD+29◦3070 BD+34◦1543
Period (d) 752 ± 2 909 ± 2 734 ± 3 755 ± 3 1254 ± 5 972 ± 2
Eccentricity 0.05 ± 0.01 0.11 ± 0.02 0.00 ± 0.07 0.04 ± 0.02 0.15 ± 0.01 0.16 ± 0.01
i (dgr) 45 ± 2 63 ± 6 / 32 ± 3 73 ± 3 43 ± 1
q (MsdB/Mms) 0.7 ± 0.02 0.64 ± 0.06 / 0.7 ± 0.02 0.37 ± 0.01 0.57 ± 0.01
a (R⊙) 367 ± 10 419 ± 19 / 322 ± 12 585 ± 5 447 ± 4
d (pc) 900 ± 100 980 ± 190 690 ± 150 282 ± 15 226 ± 37 207 ± 30
MS component
M (M⊙) 0.71 ± 0.04 0.73 ± 0.10 / 0.67 ± 0.07 1.26 ± 0.06 0.82 ± 0.07
R (R⊙) 1.2 ± 0.3 / / 0.88 ± 0.12 1.28 ± 0.97 1.21 ± 0.48
Teff (K) 4210 ± 280 G0V K0V 5970 ± 200 6190 ± 420 6100 ± 300
log g (cgs) 4.8 ± 0.3 / / 4.38 ± 0.11 4.33 ± 0.5 4.18 ± 0.4
[Fe/H] (dex) –0.85 ± 0.25 / / –0.58 ± 0.11 0.05 ± 0.16 –0.26 ± 0.08
vrot (km s-1) 10 ± 2 / / 10 ± 4 55 ± 5 25 ± 6
sdB component
M (M⊙) 0.47 0.47 / 0.47 0.47 0.47
R (R⊙) 0.3 ± 0.1 / / 0.13 ± 0.02 0.16 ± 0.1 0.14 ± 0.06
Teff (K) 29 100 ± 3000 / / 33 800 ± 2500 26 200 ± 3000 36 600 ± 3000
log g (cgs) 5.2 ± 0.3 / / 5.94 ± 0.2 5.69 ± 0.45 5.84 ± 0.35
RLOF accretion
Macc (M⊙) 0.004 ± 0.001 / / 0.003 ± 0.001 0.034 ± 0.011 0.012 ± 0.003
τacc,min (yr) 3 ± 1 / / 4 ± 1 29 ± 19 10 ± 5
Feige 87 BD–7 ◦ 5977 EC 11031–1348 TYC 2084–448–1 TYC 3871–835–1
Period (d) 938 ± 2 1262 ± 1 1099 ± 6 1098 ± 5 1263 ± 5
Eccentricity 0.11 ± 0.01 0.16 ± 0.01 0.17 ± 0.03 0.05 ± 0.03 0.16 ± 0.02
i (dgr) 79 ± 3 22 ± 2 57 ± 4 54 ± 3 17 ± 1
q (MsdB/Mms) 0.55 ± 0.01 0.4 ± 0.1 0.36 ± 0.02 0.51 ± 0.02 0.54 ± 0.02
a (R⊙) 441 ± 3 570 ± 21 540 ± 16 500 ± 14 530 ± 22
d (pc) 376 ± 44 560 ± 80 530 ± 50 345 ± 60 305 ± 50
MS component
M (M⊙) 0.84 ± 0.07 1.18 ± 0.32 1.31 ± 0.16 0.92 ± 0.10 0.87 ± 0.10
R (R⊙) 1.02 ± 0.5 6.8 ± 2.6 1.7 ± 0.7 1.1 ± 0.4 0.9 ± 0.2
Teff (K) 5980 ± 325 4810 ± 90 6480 ± 210 6440 ± 190 6270 ± 140
log g (cgs) 4.36 ± 0.42 2.90 ± 0.30 4.15 ± 0.35 4.46 ± 0.33 4.37 ± 0.30
[Fe/H] (dex) –0.5 ± 0.18 –0.2 ± 0.1 0.2 ± 0.2 –0.1 ± 0.1 0.1 ± 0.1
vrot (km s-1) 8 ± 3 24 ± 3 84 ± 6 63 ± 3 52 ± 5
sdB component
M (M⊙) 0.47 0.47 0.47 0.47 0.47
R (R⊙) 0.18 ± 0.07 0.4 ± 0.3 0.2 ± 0.2 0.2 ± 0.2 0.15 ± 0.15
Teff (K) 27 300 ± 2700 30 000 ± 7000 28 000 ± 5000 25 000 ± 7000 24 000 ± 7000
log g (cgs) 5.58 ± 0.34 5.20 ± 0.60 5.60 ± 0.50 5.80 ± 0.70 5.80 ± 0.70
RLOF accretion
Macc (M⊙) 0.004 ± 0.001 0.030 ± 0.008 0.067 ± 0.021 0.027 ± 0.008 0.021 ± 0.006
τacc,min (yr) 4 ± 2 5 ± 3 49 ± 38 29 ± 20 5 ± 3

Notes.The parameters of PG 1018−047 are taken from Deca et al. (in prep.), those of PG 1449+653 and PG 1701+359 are taken from Barlow et al. (2013), PG 1104−243 from Vos et al. (2012) and this article, BD+29◦3070, BD+34◦1543 and Feige 87 are taken from Vos et al. (2013). The remaining systems given in bold are from this article. The mass of the sdB component is taken at its canonical value of 0.47 M⊙. Macc is the mass accreted by the companion during the RLOF phase based on its rotational velocity. τacc,min is the minimum time needed to accrete this amount of matter based on the Eddington limit.

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