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Home All issues Volume 499 / No 1 (May III 2009) A&A, 499 1 (2009) L9-L12 Full HTML
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Table 1:

The sample with the 3 different chromospheric indices.
Star $T_{\rm eff}$ 1-Å K $F^{\prime }_ {\rm K}$ $\log R^{\prime}_ {\rm K}$
    index [106 erg/  
  [K] [mÅ] cm2 s] [dex]
Hyades, 0.7 Gyr  
van Bueren 1 6250 180 1.95 $\pm$ 0.17 -4.65 $\pm$ 0.04
van Bueren 2 6050 223 2.18 $\pm$ 0.24 -4.54 $\pm$ 0.05
van Bueren 10 6100 281 3.00 $\pm$ 0.31 -4.42 $\pm$ 0.04
van Bueren 15 5750 308 2.30 $\pm$ 0.34 -4.43 $\pm$ 0.06
van Bueren 17 5650 272 1.73 $\pm$ 0.29 -4.53 $\pm$ 0.07
van Bueren 18 5900 294 2.60 $\pm$ 0.33 -4.42 $\pm$ 0.05
van Bueren 31 6200 261 3.01 $\pm$ 0.28 -4.44 $\pm$ 0.04
van Bueren 49 6050 207 1.95 $\pm$ 0.21 -4.59 $\pm$ 0.05
van Bueren 52 6050 248 2.46 $\pm$ 0.27 -4.49 $\pm$ 0.05
van Bueren 65 6250 202 2.25 $\pm$ 0.20 -4.58 $\pm$ 0.04
van Bueren 66 6250 253 3.01 $\pm$ 0.27 -4.46 $\pm$ 0.04
van Bueren 73 6000 270 2.61 $\pm$ 0.30 -4.45 $\pm$ 0.05
van Bueren 88 6250 228 2.63 $\pm$ 0.23 -4.52 $\pm$ 0.04
van Bueren 97 5900 279 2.44 $\pm$ 0.31 -4.45 $\pm$ 0.05
van Bueren 118 6100 161 1.46 $\pm$ 0.15 -4.73 $\pm$ 0.04
Praesepe, 0.7 Gyr  
KW 49 6150 233 2.39 $\pm$ 0.25 -4.53 $\pm$ 0.04
KW 100 6150 255 2.71 $\pm$ 0.28 -4.48 $\pm$ 0.04
KW 208 6280 238 2.74 $\pm$ 0.25 -4.51 $\pm$ 0.04
KW 326 5800 234 1.67 $\pm$ 0.25 -4.59 $\pm$ 0.06
KW 368 5720 270 1.78 $\pm$ 0.29 -4.53 $\pm$ 0.07
KW 392 6250 248 2.84 $\pm$ 0.26 -4.48 $\pm$ 0.04
KW 418 6150 239 2.48 $\pm$ 0.26 -4.51 $\pm$ 0.04
NGC 3680, 1.4 Gyr  

Eggen 60

 6010 95 $\pm$ 5 0.56 $\pm$ 0.09 -5.12 $\pm$ 0.07
Eggen 70 6210 84 $\pm$ 10 0.47 $\pm$ 0.16 -5.25 $\pm$ 0.14
IC 4651, 1.7 Gyr  

AMC 1109

 6060 $102\pm 10$ 0.65 $\pm$ 0.14 -5.07 $\pm$ 0.10
AMC 2207 6050 $85\pm 10$ 0.46 $\pm$ 0.13 -5.22 $\pm$ 0.13
AMC 4220 5910 $133\pm 20$ 0.91 $\pm$ 0.24 -4.88 $\pm$ 0.12
AMC 4226 5980 $93\pm 15$ 0.52 $\pm$ 0.18 -5.15 $\pm$ 0.15
Eggen 45 6320 $74\pm 10$ 0.38 $\pm$ 0.16 -5.38 $\pm$ 0.18
M 67, 4.3 Gyr  

Sanders 746

 5750 108 $\pm$ 20 0.56 $\pm$ 0.20 -5.05 $\pm$ 0.16
Sanders 1048 5900 85 $\pm$ 10 0.40 $\pm$ 0.12 -5.24 $\pm$ 0.13
Sanders 1092 6160 88 $\pm$ 15 0.54 $\pm$ 0.22 -5.18 $\pm$ 0.17
Sanders 1255 5840 105 $\pm$ 20 0.57 $\pm$ 0.22 -5.06 $\pm$ 0.17
Sanders 1283 6100 82 $\pm$ 15 0.43 $\pm$ 0.21 -5.26 $\pm$ 0.21
Sanders 1287 6100 90 $\pm$ 10 0.50 $\pm$ 0.14 -5.19 $\pm$ 0.12
NGC 5822, 1.2 Gyr  
TATM 11003 6160 197 $\pm$ 8 2.02 $\pm$ 0.22 -4.61 $\pm$ 0.05
TATM 11014 6270 217 $\pm$ 7 2.52 $\pm$ 0.24 -4.54 $\pm$ 0.04
IC 4756, 0.8 Gyr  
HER 165 6070 211 $\pm$ 7 2.12 $\pm$ 0.23 -4.56 $\pm$ 0.05
HER 240 6010 206 $\pm$ 6 1.91 $\pm$ 0.22 -4.59 $\pm$ 0.05
HER 97 6120 190 $\pm$ 9 1.91 $\pm$ 0.22 -4.62 $\pm$ 0.05
Solar cycle 21, from White & Livingston (1981)  
Sun 5780 $95\pm 10$ 0.45 $\pm$ 0.10  

Source LaTeX | All tables | In the text

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