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Table 7:

The orbital elements of the programme stars.
  IRAS 08544 IRAS 12222 EN Tra IRAS 15469 IRAS 19125 IRAS 19157
    $\sigma$   $\sigma$   $\sigma$   $\sigma$   $\sigma$   $\sigma$
Period (days) 507.8 1.5 913.8 4.3 1493. 7. 389.9 0.5 519.6 2 119.5 0.2
K (km s-1) 8.6 0.3 3.5 0.5 16.3 0.6 11.9 0.3 12.6 0.5 7.3 0.7
e 0.24 0.02 0.00 0.0 0.32 0.04 0.09 0.02 0.25 0.03 0.31 0.07
$\omega$ ($^{\circ}$) 47. 7.     160. 6. 133. 16. 242. 6. 80. 14.
T0 (periastron) (JD24+) 51482. 10.     538535. 22. 51491. 17 53061. 8. 51849. 5.
$\gamma$ (km s-1) 61.98 0.16 3.65 0.17 -7.1 0.4 -14.9 0.2 67.0 0.3 33.1 0.3
rms (km s-1) 1.88   1.47   2.42   2.1   1.98   3.31  
$a_1 \sin i$ (AU) 0.39 0.01 0.29 0.04 2.12 0.08 0.42 0.01 0.58 0.02 0.08 0.01
F(M) ($M_{\odot}$) 0.0304 0.0033 0.0042 0.0017 0.57 0.06 0.068 0.006 0.097 0.012 0.0041 0.0012
N 161   82   63   161   90   111  
$\Delta t$ (cycles) 6.6   9.2   3.8   8.7   5.9   28.4  
$\Delta m(V)$ 0.25   0.23   0.81   0.25   0.19   0.23  

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