The compromised values between purity and completeness (i.e. when they are equal) achieved using colour to morphologically classify galaxies as either smooth or disc, with the corresponding colour threshold at which that compromise is achieved. Recommended colours with the highest values of compromised purity and completeness across UV, optical, and infrared surveys are marked with an asterisk ‘*’ and are shown in Fig. 2.
| Colour . | Comp. P/C smooth (per cent) . | Comp. P/C disc (per cent) . | Threshold . |
|---|---|---|---|
| NUV − r* | 65.8 | 92.8 | 4.961 |
| NUV − i | 64.9 | 92.8 | 5.334 |
| NUV − z | 64.7 | 92.8 | 5.604 |
| NUV − g | 64.6 | 92.7 | 4.098 |
| NUV − u | 62.9 | 92.2 | 2.467 |
| NUV − J* | 66.7 | 92.1 | 7.091 |
| NUV − H | 66.9 | 91.8 | 7.716 |
| NUV − K | 65.6 | 91.6 | 8.286 |
| u − J* | 44.4 | 78.5 | 4.546 |
| u − H | 44.1 | 78.5 | 5.125 |
| u − i | 56.2 | 77.3 | 2.682 |
| u − r* | 56.3 | 77.2 | 2.340 |
| u − z | 56.2 | 76.9 | 2.947 |
| u − g | 55.2 | 76.8 | 1.601 |
| u − K | 40.0 | 76.8 | 5.745 |
| g − r* | 56.6 | 76.3 | 0.742 |
| g − z | 54.4 | 76.2 | 1.330 |
| g − i | 55.3 | 75.8 | 1.089 |
| g − H | 35.9 | 75.3 | 3.463 |
| r − i | 52.4 | 75.2 | 0.344 |
| g − J | 34.8 | 75.1 | 2.899 |
| g − K | 30.7 | 73.5 | 4.130 |
| r − H | 30.2 | 73.4 | 2.626 |
| r − z | 49.7 | 73.0 | 0.602 |
| r − J | 29.2 | 73.0 | 2.093 |
| i − H | 28.9 | 72.9 | 2.240 |
| i − J | 28.5 | 72.8 | 1.687 |
| r − K | 25.6 | 71.7 | 3.309 |
| i − K | 24.7 | 71.3 | 2.907 |
| z − H | 24.3 | 71.2 | 1.983 |
| z − J | 24.2 | 71.1 | 1.430 |
| z − K | 21.9 | 70.3 | 2.661 |
| i − z | 42.2 | 69.9 | 0.259 |
| Colour . | Comp. P/C smooth (per cent) . | Comp. P/C disc (per cent) . | Threshold . |
|---|---|---|---|
| NUV − r* | 65.8 | 92.8 | 4.961 |
| NUV − i | 64.9 | 92.8 | 5.334 |
| NUV − z | 64.7 | 92.8 | 5.604 |
| NUV − g | 64.6 | 92.7 | 4.098 |
| NUV − u | 62.9 | 92.2 | 2.467 |
| NUV − J* | 66.7 | 92.1 | 7.091 |
| NUV − H | 66.9 | 91.8 | 7.716 |
| NUV − K | 65.6 | 91.6 | 8.286 |
| u − J* | 44.4 | 78.5 | 4.546 |
| u − H | 44.1 | 78.5 | 5.125 |
| u − i | 56.2 | 77.3 | 2.682 |
| u − r* | 56.3 | 77.2 | 2.340 |
| u − z | 56.2 | 76.9 | 2.947 |
| u − g | 55.2 | 76.8 | 1.601 |
| u − K | 40.0 | 76.8 | 5.745 |
| g − r* | 56.6 | 76.3 | 0.742 |
| g − z | 54.4 | 76.2 | 1.330 |
| g − i | 55.3 | 75.8 | 1.089 |
| g − H | 35.9 | 75.3 | 3.463 |
| r − i | 52.4 | 75.2 | 0.344 |
| g − J | 34.8 | 75.1 | 2.899 |
| g − K | 30.7 | 73.5 | 4.130 |
| r − H | 30.2 | 73.4 | 2.626 |
| r − z | 49.7 | 73.0 | 0.602 |
| r − J | 29.2 | 73.0 | 2.093 |
| i − H | 28.9 | 72.9 | 2.240 |
| i − J | 28.5 | 72.8 | 1.687 |
| r − K | 25.6 | 71.7 | 3.309 |
| i − K | 24.7 | 71.3 | 2.907 |
| z − H | 24.3 | 71.2 | 1.983 |
| z − J | 24.2 | 71.1 | 1.430 |
| z − K | 21.9 | 70.3 | 2.661 |
| i − z | 42.2 | 69.9 | 0.259 |
The compromised values between purity and completeness (i.e. when they are equal) achieved using colour to morphologically classify galaxies as either smooth or disc, with the corresponding colour threshold at which that compromise is achieved. Recommended colours with the highest values of compromised purity and completeness across UV, optical, and infrared surveys are marked with an asterisk ‘*’ and are shown in Fig. 2.
| Colour . | Comp. P/C smooth (per cent) . | Comp. P/C disc (per cent) . | Threshold . |
|---|---|---|---|
| NUV − r* | 65.8 | 92.8 | 4.961 |
| NUV − i | 64.9 | 92.8 | 5.334 |
| NUV − z | 64.7 | 92.8 | 5.604 |
| NUV − g | 64.6 | 92.7 | 4.098 |
| NUV − u | 62.9 | 92.2 | 2.467 |
| NUV − J* | 66.7 | 92.1 | 7.091 |
| NUV − H | 66.9 | 91.8 | 7.716 |
| NUV − K | 65.6 | 91.6 | 8.286 |
| u − J* | 44.4 | 78.5 | 4.546 |
| u − H | 44.1 | 78.5 | 5.125 |
| u − i | 56.2 | 77.3 | 2.682 |
| u − r* | 56.3 | 77.2 | 2.340 |
| u − z | 56.2 | 76.9 | 2.947 |
| u − g | 55.2 | 76.8 | 1.601 |
| u − K | 40.0 | 76.8 | 5.745 |
| g − r* | 56.6 | 76.3 | 0.742 |
| g − z | 54.4 | 76.2 | 1.330 |
| g − i | 55.3 | 75.8 | 1.089 |
| g − H | 35.9 | 75.3 | 3.463 |
| r − i | 52.4 | 75.2 | 0.344 |
| g − J | 34.8 | 75.1 | 2.899 |
| g − K | 30.7 | 73.5 | 4.130 |
| r − H | 30.2 | 73.4 | 2.626 |
| r − z | 49.7 | 73.0 | 0.602 |
| r − J | 29.2 | 73.0 | 2.093 |
| i − H | 28.9 | 72.9 | 2.240 |
| i − J | 28.5 | 72.8 | 1.687 |
| r − K | 25.6 | 71.7 | 3.309 |
| i − K | 24.7 | 71.3 | 2.907 |
| z − H | 24.3 | 71.2 | 1.983 |
| z − J | 24.2 | 71.1 | 1.430 |
| z − K | 21.9 | 70.3 | 2.661 |
| i − z | 42.2 | 69.9 | 0.259 |
| Colour . | Comp. P/C smooth (per cent) . | Comp. P/C disc (per cent) . | Threshold . |
|---|---|---|---|
| NUV − r* | 65.8 | 92.8 | 4.961 |
| NUV − i | 64.9 | 92.8 | 5.334 |
| NUV − z | 64.7 | 92.8 | 5.604 |
| NUV − g | 64.6 | 92.7 | 4.098 |
| NUV − u | 62.9 | 92.2 | 2.467 |
| NUV − J* | 66.7 | 92.1 | 7.091 |
| NUV − H | 66.9 | 91.8 | 7.716 |
| NUV − K | 65.6 | 91.6 | 8.286 |
| u − J* | 44.4 | 78.5 | 4.546 |
| u − H | 44.1 | 78.5 | 5.125 |
| u − i | 56.2 | 77.3 | 2.682 |
| u − r* | 56.3 | 77.2 | 2.340 |
| u − z | 56.2 | 76.9 | 2.947 |
| u − g | 55.2 | 76.8 | 1.601 |
| u − K | 40.0 | 76.8 | 5.745 |
| g − r* | 56.6 | 76.3 | 0.742 |
| g − z | 54.4 | 76.2 | 1.330 |
| g − i | 55.3 | 75.8 | 1.089 |
| g − H | 35.9 | 75.3 | 3.463 |
| r − i | 52.4 | 75.2 | 0.344 |
| g − J | 34.8 | 75.1 | 2.899 |
| g − K | 30.7 | 73.5 | 4.130 |
| r − H | 30.2 | 73.4 | 2.626 |
| r − z | 49.7 | 73.0 | 0.602 |
| r − J | 29.2 | 73.0 | 2.093 |
| i − H | 28.9 | 72.9 | 2.240 |
| i − J | 28.5 | 72.8 | 1.687 |
| r − K | 25.6 | 71.7 | 3.309 |
| i − K | 24.7 | 71.3 | 2.907 |
| z − H | 24.3 | 71.2 | 1.983 |
| z − J | 24.2 | 71.1 | 1.430 |
| z − K | 21.9 | 70.3 | 2.661 |
| i − z | 42.2 | 69.9 | 0.259 |
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