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Table 2.

Parameters and observational HB morphology indices for the GGCs in the sample.

ID Name [Fe/H] B R HBR′ L1 (a) L2 (a) ∂Y(b) V(HB) (c) ACND(V − I) τHB
NGC 0104 47 Tuc −0.76 0 1336 1.01 ± 0.04 0.078 ± 0.005 0.068 ± 0.006 0.049 ± 0.005 14.06 137.9 ± 11.7 1.58 ± 0.01
NGC 0288 −1.32 130 0 2.98 ± 0.12 0.534 ± 0.086 0.337 ± 0.086 0.016 ±0.012 15.44 47.8 ± 6.9 9.39 ± 0.37
NGC 0362 −1.30 12 282 1.24 ± 0.07 0.086 ± 0.005 0.608 ± 0.064 0.026 ±0.008 15.44 126.1 ± 11.2 3.24 ± 0.01
NGC 1261 −1.27 35 201 1.36 ± 0.06 0.088 ± 0.005 0.644 ± 0.038 0.019 ± 0.007 16.70 114.0 ± 10.7 2.42 ± 0.02
NGC 1851 −1.18 137 156 1.95 ± 0.01 0.098 ± 0.004 0.679 ± 0.010 0.025 ± 0.006 16.09 90.9 ± 9.5 3.51 ± 0.06
NGC 2298 −1.96 53 1 2.90 ± 0.17 0.486 ± 0.020 0.267 ± 0.023 0.011 ± 0.012 16.11 57.7 ± 7.6 5.97 ± 0.17
NGC 3201 −1.51 90 103 1.96 ± 0.01 0.106 ± 0.015 0.649 ± 0.022 0.028 ± 0.032 14.76 88.7 ± 9.4 2.80 ± 0.05
NGC 4147 −1.78 61 2 2.76 ± 0.13 0.271 ± 0.027 0.476 ± 0.029 – 17.02 61.7 ± 7.9 5.96 ± 0.12
NGC 4590 M 68 −2.27 61 1 2.58 ± 0.09 0.205 ± 0.029 0.524 ± 0.030 0.012 ± 0.009 15.68 74.8 ± 8.6 4.43 ±0.07
NGC 4833 −1.89 280 8 2.88 ± 0.07 0.287 ± 0.037 0.538 ± 0.037 0.051 ± 0.009 15.60 55.2 ± 7.4 6.21 ± 0.28
NGC 5024 M 53 −2.06 495 0 2.89 ± 0.06 0.158 ± 0.035 0.602 ± 0.036 0.04 ± 0.008 16.81 57.9 ± 7.6 6.67 ± 0.16
NGC 5053 −2.30 34 8 2.46 ± 0.12 0.223 ± 0.090 0.439 ± 0.090 0.004 ± 0.35 16.69 74.2 ± 8.6 4.35 ± 0.11
NGC 5272 M 3 −1.50 213 392 2.21 ± 0.02 0.150 ± 0.016 0.613 ± 0.018 0.041 ± 0.009 15.64 81.5 ± 9.0 4.13 ± 0.05
NGC 5286 −1.70 548 36 2.80 ± 0.05 0.213 ± 0.034 0.670 ± 0.035 0.044 ± 0.004 16.63 53.7 ± 7.3 6.17 ± 0.30
NGC 5466 −2.31 72 5 2.62 ± 0.11 0.225 ± 0.062 0.457 ± 0.063 0.007 ± 0.024 16.52 68.7 ± 8.3 5.02 ± 0.10
NGC 5904 M 5 −1.33 98 155 2.42 ± 0.03 0.150 ± 0.012 0.681 ± 0.014 0.037 ± 0.007 15.07 68.9 ± 8.3 5.04 ± 0.14
NGC 5927 −0.29 0 447 1.00 ± 0.07 0.043 ± 0.003 0.062 ± 0.004 0.055 ± 0.015 16.55 135.2 ± 11.6 0.97 ± 0.01
NGC 5986 −1.63 459 26 2.88 ± 0.06 0.460 ± 0.052 0.443 ± 0.053 0.031 ± 0.012 16.52 46.1 ± 6.8 7.85 ± 0.46
NGC 6093 M 80 −1.75 332 16 2.87 ± 0.07 0.464 ± 0.059 0.447 ± 0.062 0.027 ± 0.012 16.10 53.8 ± 7.3 7.86 ± 0.36
NGC 6101 −1.98 169 17 2.87 ± 0.09 0.485 ± 0.025 0.223 ± 0.025 0.017 ± 0.011 16.60 62.4 ± 7.9 5.43 ± 0.15
NGC 6121 M 4 −1.18 51 55 1.98 ± 0.01 0.120 ± 0.020 0.569 ± 0.020 0.014 ± 0.006 13.45 86.7 ± 9.3 1.96 ± 0.06
NGC 6144 −1.82 62 0 3.00 ± 0.18 0.533 ± 0.024 0.229 ± 0.023 0.017 ± 0.013 16.40 28.6 ± 5.3 4.98 ± 0.88
NGC 6171 M 107 −1.03 12 89 1.37 ± 0.09 0.100 ± 0.014 0.513 ± 0.074 0.024 ± 0.014 15.00 116.2 ± 10.8 0.28 ± 0.03
NGC 6205 M 13 −1.58 705 0 2.99 ± 0.05 0.527 ± 0.013 0.441 ± 0.012 0.052 ± 0.004 14.90 41.0 ± 6.4 13.37 ± 0.72
NGC 6218 M 12 −1.33 188 0 3.00 ± 0.10 0.561 ± 0.034 0.299 ± 0.035 0.011 ± 0.011 14.60 49.8 ± 7.1 9.05 ± 0.32
NGC 6254 M 10 −1.57 257 0 3.00 ± 0.09 0.588 ± 0.032 0.260 ± 0.033 0.029 ± 0.011 14.65 40.6 ± 6.4 11.03 ± 0.66
NGC 6304 −0.37 0 170 1.03 ± 0.10 0.062 ± 0.007 0.060 ± 0.004 0.025 ± 0.006 15.60 0 0
NGC 6341 M 92 −2.25 340 6 2.92 ± 0.07 0.261 ± 0.075 0.542 ± 0.075 0.039 ± 0.006 15.10 47.4 ± 6.9 8.95 ± 0.30
NGC 6352 −0.62 0 96 1.00 ± 0.14 0.072 ± 0.007 0.056 ± 0.003 0.027 ± 0.006 15.13 130.6 ± 11.4 1.44 ± 0.01
NGC 6362 −1.07 56 135 1.65 ± 0.07 0.122 ± 0.004 0.621 ± 0.039 0.004 ± 0.011 15.33 115.1 ± 10.7 2.24 ± 0.02
NGC 6366 −0.59 0 39 1.02 ± 0.22 0.076 ± 0.005 0.058 ± 0.018 0.011 ± 0.011 15.65 136.9 ± 11.7 0.23 ± 0.01
NGC 6388 −0.45 267 1549 1.30 ± 0.03 0.057 ± 0.004 0.836 ± 0.008 0.067 ± 0.009 16.85 119.5 ± 10.9 1.88 ± 0.03
NGC 6397 −1.99 120 0 2.98 ± 0.13 0.534 ± 0.023 0.232 ± 0.030 0.008 ± 0.011 12.87 51.3 ± 7.1 8.29 ± 0.17
NGC 6426 −2.15 46 11 2.49 ± 0.10 0.178 ± 0.018 0.519 ± 0.023 0.021 ± 0.006 18.16 75.8 ± 8.7 1.01 ± 0.16
NGC 6441 −0.44 243 1769 1.26 ± 0.02 0.048 ± 0.003 0.904 ± 0.024 0.081 ± 0.022 17.51 113.9 ± 10.7 1.55 ± 0.03
NGC 6496 −0.46 0 80 1.00 ± 0.16 0.074 ± 0.011 0.056 ± 0.005 0.021 ± 0.006 16.00 143.2 ± 12.0 0.11 ± 0.02
NGC 6535 −1.79 24 0 3.00 ± 0.29 0.510 ± 0.026 0.271 ± 0.031 0.003 ± 0.022 15.75 53.0 ± 7.2 3.01 ± 0.33
NGC 6541 −1.82 411 0 2.99 ± 0.07 0.563 ± 0.026 0.347 ± 0.033 0.045 ± 0.006 15.35 41.7 ± 6.4 10.26 ± 0.46
NGC 6584 −1.50 25 38 1.90 ± 0.03 0.102 ± 0.012 0.558 ± 0.026 0.015 ± 0.011 16.53 94.4 ± 9.7 2.81 ± 0.05
NGC 6624 −0.42 0 192 1.00 ± 0.10 0.077 ± 0.006 0.085 ± 0.006 0.022 ± 0.003 15.60 141.8 ± 11.9 0.11 ± 0.02
NGC 6637 −0.59 0 256 1.00 ± 0.09 0.078 ± 0.004 0.065 ± 0.005 0.011 ± 0.005 15.34 137.8 ± 11.7 0.54 ± 0.02
NGC 6652 −0.76 0 26 1.00 ± 0.28 0.073 ± 0.011 0.080 ± 0.012 0.017 ± 0.011 15.40 139.8 ± 11.8 0.64 ± 0.01
NGC 6656 M 22 −1.70 512 13 2.94 ± 0.06 0.336 ± 0.088 0.577 ± 0.087 0.041 ± 0.012 14.15 55.1 ± 7.4 6.53 ± 0.31
NGC 6681 M 70 −1.62 147 0 2.97 ± 0.11 0.558 ± 0.046 0.334 ± 0.045 0.029 ± 0.015 15.55 45.1 ± 6.7 10.21 ± 0.37
NGC 6717 −1.26 30 0 3.00 ± 0.25 0.495 ± 0.032 0.310 ± 0.033 0.003 ± 0.009 15.55 52.3 ± 7.2 4.46 ± 0.24
NGC 6723 −1.10 106 152 1.85 ± 0.02 0.127 ± 0.007 0.704 ± 0.010 0.024 ± 0.007 15.48 83.4 ± 9.1 3.38 ± 0.08
NGC 6752 −1.55 330 0 3.00 ± 0.08 0.378 ± 0.024 0.578 ± 0.025 0.042 ± 0.004 13.70 39.4 ± 6.3 13.94 ± 0.78
NGC 6779 M 56 −2.00 177 0 3.00 ± 0.10 0.508 ± 0.031 0.284 ± 0.030 0.031 ± 0.008 16.18 47.1 ± 6.9 7.38 ± 0.25
NGC 6809 M 55 −1.93 244 2 2.93 ± 0.08 0.476 ± 0.055 0.313 ± 0.053 0.026 ± 0.015 14.40 58.3 ± 7.6 6.59 ± 0.21
NGC 6838 M 71 −0.82 0 70 1.00 ± 0.17 0.084 ± 0.012 0.057 ± 0.010 0.024 ± 0.010 14.48 126.5 ± 11.2 1.40 ± 0.01
NGC 6934 −1.56 103 71 2.13 ± 0.02 0.097 ± 0.013 0.678 ± 0.016 0.018 ± 0.004 16.86 83.7 ± 9.1 3.41 ± 0.08
NGC 6981 M 72 −1.48 37 27 2.14 ± 0.03 0.142 ± 0.016 0.570 ± 0.019 0.017 ± 0.006 16.90 84.9 ± 9.2 3.61 ± 0.06
NGC 7006 −1.46 75 93 1.92 ± 0.02 0.123 ± 0.016 0.581 ± 0.018 – 18.80 92.5 ± 9.6 3.12 ± 0.05
NGC 7078 M 15 −2.33 554 56 2.64 ± 0.04 0.174 ± 0.011 0.713 ± 0.019 0.069 ± 0.006 15.83 58.3 ± 7.6 6.63 ± 0.24
NGC 7089 M 2 −1.66 896 14 2.92 ± 0.04 0.150 ± 0.035 0.790 ± 0.037 0.052 ± 0.009 16.05 50.8 ± 7.1 8.23 ± 0.47
NGC 7099 M 30 −2.33 175 6 2.90 ± 0.10 0.462 ± 0.103 0.261 ± 0.103 0.022 ± 0.010 15.10 57.7 ± 7.6 6.40 ± 0.20
ARP 2 −1.74 22 0 2.86 ± 0.10 0.491 ± 0.021 0.184 ± 0.021 – 18.13 64.7 ± 8.0 5.83 ± 0.05
IC 4499 −1.62 81 108 1.90 ± 0.02 0.113 ± 0.026 0.508 ± 0.041 0.017 ± 0.008 17.65 94.7 ± 9.7 2.65 ± 0.04
Lynga 7 −0.67 0 90 1.00 ± 0.15 0.055 ± 0.050 0.093 ± 0.009 – 16.70 0 0
Pal 2 −1.29 194 0 3.00 ± 0.10 – – – 20.85 88.2 ± 9.4 0.11 ± 0.08
Rup 106 −1.78 42 0 2.78 ± 0.16 0.135 ± 0.012 0.210 ± 0.032 – 17.80 119.2 ± 10.9 1.84 ± 0.02
Terzan 7 −0.12 0 38 1.00 ± 0.23 0.057 ± 0.007 0.032 ± 0.008 – 17.50 133.7 ± 11.6 0.53 ± 0.01
Terzan 8 −2.34 49 0 2.92 ± 0.19 0.500 ± 0.050 0.223 ± 0.050 – 17.95 55.9 ± 7.5 5.21 ± 0.17

Notes. Columns are: observational values of blue (B), red (R) HB star counts and HBR′, L1, L2 indices, the spread in helium content ∂Y, V(HB) and ACND(V − I) used to estimate the new parameter τHB.

References.

(c)

Milone et al. (2014); (d) estimated by the authors.

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