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Table 5.

Tentative orbital parameters and GES recommended atmospheric parameters for two SB1 dwarfs.

GES ID 21303728+1202029 (a) 12575381−7053113
Field M 15 NGC 4833
Gaia DR2 source ID 1745931560476128000 5843793495793252992
G 15.72 16.02

P [d] 5.8 3.9147 ± 0.0002
e 0.3 0.26 ± 0.02
ω [°] 82 187.5 ± 1.6
T0 – 2400000.5 [d] 56241.2 56478.9 ± 1.4
v0 [km s−1] 17.7 −2.63 ± 0.26
K1 [km s−1] 5.6 69.82 ± 0.95
f(M) [M] 0.124 ± 0.006
σ1 (O–C) [km s−1] 0.324 0.410
Nobs 13 10
Nepochs 4 5

Teff [K] 5754 ± 58 5318 ± 170
log g 4.52 ± 0.12 4.13 ± 0.21
[Fe/H] −0.42 ± 0.26

M1 [M] 1.04 ± 0.03 0.88 ± 0.07

Notes. Masses are estimated from Eq. (21).

(a)

Only orbital parameters are given here as a tentative solution. More observations are needed for this star.

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