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Table 2

Set of characteristics and parameters used in the different tests to examine the robustness of the STECKMAP solutions.

Test Models Age range (yr) Kinematics μ x μ Z μ v rms
1 Vazdekis et al. (2010) [0.063 × 109, 17.8 × 109] FIX 10-2 102 –** 0.1215
2 Vazdekis et al. (2010) + [0.001 × 109, 17.8 × 109] FIX 10-2 102 – 0.1298
González Delgado et al. (2005)
3 Vazdekis et al. (2010) [0.063 × 109, 13.5 × 109] FIX 10-2 102 – 0.1216
4 Vazdekis et al. (2010) + [0.001 × 109, 13.5 × 109] FIX 10-2 102 – 0.1298
González Delgado et al. (2005)
5 Vazdekis et al. (2010) [0.063 × 109, 17.8 × 109] FIT 10-2 102 10-2 0.1670
6 Vazdekis et al. (2010) + [0.001 × 109, 17.8 × 109] FIT 10-2 102 10-2 0.1764
González Delgado et al. (2005)
7 Vazdekis et al. (2010) [0.063 × 109, 13.5 × 109] FIT 10-2 102 10-2 0.1768
8 Vazdekis et al. (2010) + [0.001 × 109, 13.5 × 109] FIT 10-2 102 10-2 0.1766
González Delgado et al. (2005)
9 Vazdekis et al. (2010) [0.063 × 109, 17.8 × 109] FIX 102 102 – 0.1218
10 Vazdekis et al. (2010) [0.063 × 109, 17.8 × 109] FIX 10-2 10-2 – 0.1217
11 Vazdekis et al. (2010) [0.063 × 109, 17.8 × 109] FIX 10-6 105 – 0.1224
12 Vazdekis et al. (2010) [0.063 × 109, 17.8 × 109] FIX 10-8 10-8 – 0.1217
13 Vazdekis et al. (2010) [0.063 × 109, 17.8 × 109] FIX 104 105 – 0.1223
14 Vazdekis et al. (2010) [0.063 × 109, 17.8 × 109] FIX 1015 1014 – 0.1224
15 Vazdekis et al. (2010) [0.063 × 109, 17.8 × 109] FIX 10-15 10-14 – 0.1217
16 Vazdekis et al. (2010) [0.063 × 109, 17.8 × 109] FIX 10-2 106 – 0.1227
17 Vazdekis et al. (2010) [0.063 × 109, 13.5 × 109] FIX 102 102 – 0.1218
18 Vazdekis et al. (2010) [0.063 × 109, 13.5 × 109] FIX 10-2 10-2 – 0.1218
19 Vazdekis et al. (2010) [0.063 × 109, 13.5 × 109] FIX 10-6 105 – 0.1226
20 Vazdekis et al. (2010) [0.063 × 109, 13.5 × 109] FIX 10-8 10-8 – 0.1218
21 Vazdekis et al. (2010) [0.063 × 109, 13.5 × 109] FIX 104 105 – 0.1224
22 Vazdekis et al. (2010) [0.063 × 109, 13.5 × 109] FIX 1015 1014 – 0.1249
23 Vazdekis et al. (2010) [0.063 × 109, 13.5 × 109] FIX 10-15 10-14 – 0.1218
24* Vazdekis et al. (2010) [0.063 × 109, 13.5 × 109] FIX 10-2 106 – 0.1225

Notes. Column 1 is the number of the test. Column 2 shows the models used in each test, i.e. Vazdekis et al. (2010) or Vazdekis et al. (2010)+González Delgado et al. (2005). Column 3 gives the age range. In Col. 4 we highlight the fact of fitting or fixing the kinematics. μx stands for “smoothing parameter for the stellar age distribution”, μZ stands for “smoothing parameter for the age-Z relation”, and μv stands for “smoothing parameter for the line-of-sight velocity distribution”. The last column gives the quality of each of the tests by means of its residuals rms computed as the mean values of the absolute differences between the data and the fit.

(*)

Test chosen to be compared with the CMD results (see text for details).

(**)

As we are fixing the stellar kinematics and thus not fitting it, this parameter is not applicable.

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