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Table A.1

Characteristics of the sample stars.

Star V BV N Trend Period [d] ΔP [d] Sig P lit Ref. SMWO σ

HD 739 5.25 0.40 15 0.142 0.004
HD 1461 6.46 0.68 13 + 0.156 0.003
HD 5133 7.17 0.94 12 0.430 0.013
HD 6582 5.17 0.69 20 +/– 0.175 0.005
HD 6920 5.68 0.56 25 +/– 13.1 N84 0.198 0.006
HD 9826 4.10 0.54 30 –/+ 14.0 H00 0.152 0.004
HD 10307 4.96 0.62 22 –/+ 0.152 0.005
HD 10476 5.24 0.84 20 + 35.2 D93 0.198 0.010
HD 10700 3.50 0.72 17 –/+ 34 B96 0.171 0.004
HD 13421 5.64 0.52 20 + 2.173, 4.513 0.002, 0.09 2, 1 4.35 S80 0.137 0.004
HD 16673 5.80 0.47 22 –/+ 7.4 W11 0.222 0.011
HD 17206 4.46 0.48 19 –/+ 3.847 0.009 1 0.223 0.009
HD 17925 6.05 0.86 33 –/+ 7.150 0.027 2 6.76 W11 0.701* 0.023
HD 18940 7.06 0.62 22 + 10.25 0.08 1 8.92 W11 0.295 0.016
HD 19019 6.76 0.52 19 13.18 0.12 1 9.70 W11 0.216 0.006
HD 19373 4.05 0.59 35 0.146 0.001
HD 20619 7.04 0.34 26 +/– 21.18 0.61 1 0.203 0.008
HD 20630 4.85 0.67 9 9.0 0.2 1 9.24 D96 0.380 0.014
HD 22049 3.73 0.88 23 –/+ 11.76 0.08 1 11.68 W11 0.548* 0.016
HD 22072 6.17 0.89 28 0.142 0.003
HD 23249 3.54 0.92 32 158? 13 2 0.146 0.004
HD 25457 5.38 0.50 26 3.13 W11 0.329 0.004
HD 25680 5.90 0.62 17 9.1 SF87 0.317 0.005
HD 25998 5.50 0.47 60 2.6 N84 0.287 0.006
HD 26923 6.30 0.56 50 –/+ 60.4? 2.1 2 0.286 0.007
HD 30495 5.50 0.64 35 + 11.83 0.09 1 11 B96 0.281 0.012
HD 35296 5.00 0.52 56 +/– 3.503 0.006 3 3.56 W11 0.319 0.007
HD 37124 7.68 0.67 2 0.187 0.005
HD 37394 6.23 0.84 43 –/+ 10.74 0.03 3 11.0 W11 0.460 0.015
HD 38858 5.97 0.64 16 0.176 0.004
HD 39587 4.40 0.60 41 –/+ 5.136 0.009 3 5.36 W11 0.323 0.011
HD 39881 6.60 0.65 17 13.56 0.50 1 0.157 0.002
HD 41330 6.12 0.60 39 + 23.44 0.40 1 0.150 0.004
HD 42807 6.44 0.68 32 –/+ 11.77 0.08 2 0.364 0.011
HD 43162 6.37 0.68 28 7.077 0.022 3 0.419 0.021
HD 43587 5.70 0.59 21 –/+ 0.155 0.003
HD 45067 5.90 0.53 34 8.0 C07 0.142 0.004
HD 58855 5.36 0.42 43 –/+ 16.27 0.21 1 0.151 0.004
HD 61421 0.37 0.42 45 –/+ 0.164 0.002
HD 72905 5.64 0.62 49 5.227 0.015 2 4.69 D96 0.400 0.009
HD 72945 5.92 0.51 23 +/– 0.146 0.003
HD 75332 6.22 0.50 41 + 3.870 0.009 1 4 B96 0.281 0.010
HD 75528 6.38 0.63 34 –/+ 0.142 0.005
HD 75732 5.95 0.87 34 40.7 0.7 3 42.0 B98 0.177 0.008
HD 79028 5.20 0.51 39 30.8 0.7 1 0.146 0.004
HD 84117 4.94 0.53 31 –/+ 5.970 0.025 1 0.150 0.004
HD 84737 5.10 0.62 31 +/– 4.296 0.017 2 0.142 0.004
HD 86728 5.40 0.62 33 +/– 10.64 0.14 1 0.150 0.005
HD 89744 5.74 0.49 40 12.3 N84 0.140 0.006
HD 95128 5.04 0.62 38 24.8 0.8 1 22.7 S10 0.152 0.005
HD 97334 6.41 0.61 28 +/– 7.93 0.05 2 7.60 W11 0.356 0.012

Notes. Sig: 1: low significance (between 1 and 2σ), 2: between 2 and 3σ; 3: 3σ and higher. For question marks in Col. 6 see Sect. 4. Asterisks in Col. 11 mark preliminary estimates because Eq. (1) needs to be improved with more highly active stars in future. References in Col. 10: W11 Wright et al. (2011), N84 Noyes et al. (1984), C07 Cincunegui et al. (2007), H00 Henry et al. (2000), B96 Baliunas et al. (1996), B98 Baliunas et al. (1998), S80 Stimets & Giles (1980), D93 Donahue (1993), SF87 Simon & Fekel (1987), S10 Simpson et al. (2010).

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