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Table 3

Results of GMM runs on GCs selected using criterion #1 (based on ΔCaT, see text).

Color p 1 p 2 σ 1 σ 2 N GC Frac2 p(χ2) p(DD) p(kurt) DD Kurtosis
(1) (2) (3) (4) (5) (6) (7) (8) (9) (10) (11) (12)
HS (HAWK-I+SLUGGS) sample
g − i 0.794 ± 0.010 1.103 ± 0.013 0.055 ± 0.008 0.075 ± 0.010 73 0.531 ± 0.067 0.001 0.023 0.001 4.71 ± 0.48 –1.403
g − J 1.051 ± 0.038 1.672 ± 0.053 0.104 ± 0.020 0.231 ± 0.032 73 0.561 ± 0.076 0.001 0.118 0.001 3.47 ± 0.51 –1.241
g − H 1.034 ± 0.028 1.806 ± 0.040 0.143 ± 0.020 0.202 ± 0.031 73 0.524 ± 0.070 0.001 0.033 0.001 4.41 ± 0.52 –1.428
g − Ks 0.874 ± 0.064 1.736 ± 0.069 0.225 ± 0.051 0.232 ± 0.059 73 0.505 ± 0.095 0.001 0.078 0.001 3.77 ± 0.49 –1.273
i − J 0.263 ± 0.030 0.567 ± 0.057 0.065 ± 0.020 0.163 ± 0.027 73 0.587 ± 0.125 0.001 0.453 0.012 2.44 ± 0.58 –0.944
i − H 0.219 ± 0.023 0.679 ± 0.037 0.078 ± 0.016 0.156 ± 0.025 73 0.568 ± 0.080 0.001 0.080 0.001 3.74 ± 0.55 –1.364
i − Ks 0.096 ± 0.077 0.647 ± 0.068 0.195 ± 0.051 0.161 ± 0.051 73 0.465 ± 0.137 0.025 0.219 0.009 3.08 ± 0.49 –1.021
J − Ks −0.164 ± 0.122 0.041 ± 0.056 0.157 ± 0.039 0.075 ± 0.031 73 0.364 ± 0.239 0.107 0.720 0.918 1.67 ± 0.88 0.536
H − Ks −0.318 ± 0.118 −0.112 ± 0.032 0.114 ± 0.035 0.088 ± 0.022 73 0.919 ± 0.240 0.228 0.623 0.976 2.03 ± 1.44 1.018
J − H −0.099 ± 0.054 0.057 ± 0.090 0.046 ± 0.023 0.086 ± 0.030 73 0.889 ± 0.303 0.862 0.535 0.708 2.26 ± 1.05 0.012
CaT 5.323 ± 0.254 7.705 ± 0.242 0.681 ± 0.230 0.745 ± 0.145 73 0.567 ± 0.110 0.010 0.156 0.005 3.34 ± 0.59 –1.062
HA (HAWK-I+ACS) sample
gF475W − zF850LP 0.947 ± 0.014 1.361 ± 0.016 0.070 ± 0.011 0.126 ± 0.012 128 0.664 ± 0.048 0.001 0.065 0.001 4.06 ± 0.35 –1.254
gF475W − J 1.072 ± 0.025 1.676 ± 0.032 0.099 ± 0.016 0.229 ± 0.022 128 0.681 ± 0.052 0.001 0.124 0.001 3.42 ± 0.35 –1.145
gF475W − H 1.067 ± 0.035 1.779 ± 0.034 0.145 ± 0.027 0.224 ± 0.022 128 0.654 ± 0.051 0.001 0.086 0.001 3.78 ± 0.31 –1.147
gF475W − Ks 0.869 ± 0.032 1.681 ± 0.035 0.153 ± 0.021 0.261 ± 0.028 128 0.679 ± 0.046 0.001 0.081 0.001 3.79 ± 0.35 –1.063
zF850LP − J 0.127 ± 0.057 0.329 ± 0.085 0.070 ± 0.027 0.120 ± 0.037 128 0.666 ± 0.268 0.099 0.546 0.012 2.06 ± 0.50 –0.805
zF850LP − H 0.119 ± 0.059 0.419 ± 0.024 0.089 ± 0.036 0.110 ± 0.026 128 0.640 ± 0.160 0.003 0.231 0.003 3.01 ± 0.72 –0.947
zF850LP − Ks −0.110 ± 0.061 0.299 ± 0.032 0.103 ± 0.037 0.163 ± 0.026 128 0.755 ± 0.114 0.011 0.201 0.038 3.00 ± 0.51 –0.655
J − Ks −0.031 ± 0.094 −0.070 ± 0.183 0.047 ± 0.046 0.155 ± 0.052 128 0.820 ± 0.334 0.420 0.898 0.920 0.33 ± 1.81 0.475
H − Ks −0.119 ± 0.048 −0.073 ± 0.039 0.098 ± 0.024 0.028 ± 0.024 128 0.151 ± 0.261 0.435 0.863 0.569 0.64 ± 0.94 –0.097
J − H 0.041 ± 0.048 0.324 ± 0.130 0.079 ± 0.024 0.034 ± 0.043 128 0.029 ± 0.377 0.013 0.029 0.987 4.65 ± 1.92 1.102
HSA (HAWK-I+SLUGGS+ACS) sample
gF475W − zF850LP 0.938 ± 0.016 1.372 ± 0.020 0.068 ± 0.012 0.119 ± 0.022 58 0.555 ± 0.075 0.001 0.036 0.001 4.46 ± 0.63 –1.418
i − zF850LP 0.139 ± 0.013 0.276 ± 0.013 0.040 ± 0.008 0.049 ± 0.009 58 0.596 ± 0.099 0.118 0.241 0.020 3.09 ± 0.44 –0.949
g − i 0.801 ± 0.030 1.114 ± 0.012 0.054 ± 0.031 0.074 ± 0.016 58 0.545 ± 0.085 0.001 0.013 0.001 4.86 ± 1.07 –1.446
gF475W − J 1.065 ± 0.029 1.687 ± 0.060 0.112 ± 0.022 0.254 ± 0.040 58 0.558 ± 0.088 0.001 0.215 0.002 3.17 ± 0.60 –1.139
gF475W − H 1.045 ± 0.037 1.794 ± 0.052 0.145 ± 0.026 0.239 ± 0.048 58 0.552 ± 0.080 0.001 0.097 0.001 3.79 ± 0.62 –1.266
gF475W − Ks 0.892 ± 0.059 1.741 ± 0.074 0.236 ± 0.047 0.268 ± 0.064 58 0.506 ± 0.098 0.014 0.176 0.008 3.36 ± 0.54 –1.086
zF850LP − J 0.127 ± 0.035 0.290 ± 0.087 0.038 ± 0.027 0.154 ± 0.043 58 0.657 ± 0.197 0.007 0.799 0.173 1.45 ± 1.08 –0.658
zF850LP − H 0.133 ± 0.049 0.457 ± 0.056 0.103 ± 0.030 0.106 ± 0.030 58 0.454 ± 0.154 0.055 0.267 0.010 3.10 ± 0.66 –1.048
zF850LP − Ks 0.042 ± 0.143 0.431 ± 0.133 0.227 ± 0.068 0.150 ± 0.059 58 0.260 ± 0.280 0.860 0.669 0.252 2.03 ± 0.62 –0.577
g − J 1.069 ± 0.025 1.714 ± 0.044 0.107 ± 0.017 0.223 ± 0.035 58 0.554 ± 0.078 0.001 0.111 0.001 3.68 ± 0.61 –1.315
g − H 1.045 ± 0.029 1.814 ± 0.040 0.134 ± 0.020 0.214 ± 0.034 58 0.556 ± 0.072 0.001 0.049 0.001 4.30 ± 0.63 –1.416
g − Ks 0.903 ± 0.068 1.769 ± 0.067 0.243 ± 0.050 0.230 ± 0.063 58 0.498 ± 0.096 0.004 0.116 0.001 3.66 ± 0.56 –1.230
i − J 0.302 ± 0.027 0.661 ± 0.062 0.087 ± 0.023 0.124 ± 0.033 58 0.424 ± 0.142 0.001 0.168 0.009 3.35 ± 0.80 –1.064
i − H 0.235 ± 0.026 0.686 ± 0.040 0.081 ± 0.018 0.159 ± 0.027 58 0.589 ± 0.077 0.001 0.127 0.001 3.57 ± 0.62 –1.335
i − Ks 0.111 ± 0.084 0.659 ± 0.089 0.203 ± 0.060 0.170 ± 0.056 58 0.460 ± 0.159 0.122 0.295 0.017 2.94 ± 0.56 –0.983
J − Ks −0.169 ± 0.146 0.030 ± 0.052 0.159 ± 0.049 0.076 ± 0.030 58 0.394 ± 0.249 0.166 0.778 0.963 1.60 ± 1.23 0.874
H − Ks −0.500 ± 0.118 −0.131 ± 0.055 0.023 ± 0.033 0.090 ± 0.025 58 0.983 ± 0.321 0.088 0.004 0.989 5.62 ± 1.57 1.380
J − H −0.002 ± 0.079 0.098 ± 0.036 0.083 ± 0.029 0.054 ± 0.020 58 0.480 ± 0.297 0.475 0.800 0.584 1.44 ± 1.15 –0.194
CaT 5.693 ± 0.333 7.833 ± 0.290 0.836 ± 0.279 0.618 ± 0.149 58 0.504 ± 0.159 0.044 0.303 0.044 2.91 ± 0.67 –0.856

Notes. Columns list: (1) color; (2, 3) mean and uncertainty of the first and second peaks in the double-Gaussian model; (4, 5) width and uncertainty of the first and second peaks; (6) number of GC candidates selected; (7) fraction of GC candidates associated with the second, red, peak; (8–10) GMM p-values based on the likelihood-ratio test p(χ2), peak separation p(DD), and kurtosis p(kurt), indicating the significance of the preference for a double-Gaussian over a single-Gaussian model (lower p-values are more significant); (11) separation of the peaks in units of the two Gaussian widths; (12) kurtosis of the distribution (DD ≥ 2 and negative kurtosis are required for significative split between the two Gaussian distributions).

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