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Table 3.

Tidal tail contamination due to field stars at the age of the Pleiades.

Run name NA+ rh, A+ NFGK rh, FGK pA+ rh, A+ pFGK rh, FGK pA+ rh, A+ pFGK rh, FGK
[pc] [pc] [pc] [pc] [pc] [pc]
C03G13 68 198 192 217 1.00 198 0.73 165 0.60 149 0.51 129
C03G23 13 232 32 122 0.84 163 0.56 70 0.33 103 0.44 59
C03GA 4 169 10 75 0.84 98 0.50 46 0.23 37 0.30 36
C03W1 2 131 5 76 0.95 86 0.60 52 0.40 20 0.40 47
C03W5 16 56 48 57 1.00 56 0.98 57 1.00 56 0.98 56

C10G13 171 363 505 350 1.00 362 0.63 248 0.46 211 0.37 178
C10G23 26 289 67 192 0.88 248 0.48 98 0.25 119 0.30 78
C10GA 6 380 18 154 0.80 287 0.39 69 0.07 15 0.22 59
C10W1 0 0 6 106 0 0.50 66 0 0.17 58
C10W5 11 90 38 87 1.00 90 0.97 86 0.95 88 0.92 84

Notes. To provide an idea of the statistics, we also list the total number of A and earlier stars (NA+) and the total number of F, G, and K stars (NFGK) in the tail per one simulation. We calculate the half-number radius for each of the group separately (rh, A+ and rh, FGK). The values in Cols. 2–5 are for the tail in total, i.e. without any contamination taken into account. Columns 6–9 list the fraction pA+ of stars earlier than A, and pFGK for F, G, and K stars together which are located above the contamination threshold for the Besançon model, which is ntl ≈ 7 × 10−8 pc−3 for A stars, and ntl ≈ 1 × 10−5 pc−3 for FGK stars. The half-number radius for both subgroups calculated for stars that are above the density threshold is denoted rh, A+ and rh, FGK. Columns 10–13 are the same as Cols. 6–9, but for the case of the higher contamination, i.e. HyPl stream and the Besançon model together. In this case, the contamination threshold is ntl ≈ 2 × 10−5 pc−3 for A stars and earlier, and ntl ≈ 3 × 10−5 pc−3 for F, G, and K stars. The contamination threshold for both the Besançon model and HyPl stream is taken for velocity |vtl| ≲ 4 km s−1 around the (Upl,Vpl,Wpl) = (−4.7, −23.8, −8.9) km s−1 velocity of the Pleiades. The results are averaged over 4 simulations for the more massive clusters, and over 13 simulations for the lower mass clusters.

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