Table 1
Characteristic quantities for ℓλ,IMF(t∗) when modeled as a power law.
| Index | α | ⟨t∗⟩λ | % at ⟨t∗⟩λ | t λ,99% | t λ,95% | t λ,90% | t λ,80% | t λ,50% |
| 106 yr | 106 yr | 106 yr | 106 yr | 106 yr | 106 yr | |||
|
|
||||||||
| generic Q(H) | >2.00 | <13 | >89% | <148 | <30 | <15 | <7.5 | <3 |
| generic UV | 1.50 | 131 | 91% | 3325 | 375 | 112 | 31 | 5 |
| generic U | 1.10 | 937 | 80% | 11156 | 6187 | 3100 | 885 | 43 |
| generic IR/V | 0.80 | 2549 | 67% | 12457 | 10462 | 8337 | 5120 | 817 |
|
|
||||||||
| α values from comparison with synthesis models in Sect. 3.3 | ||||||||
|
|
||||||||
| Q(H) | 4.00 | 2 | 56% | 9 | 5 | 4 | 3 | 2 |
| galex/FUV | 1.55 | 101 | 91% | 2386 | 254 | 80 | 24 | 5 |
| galex/NUV | 1.50 | 131 | 91% | 3325 | 375 | 112 | 31 | 5 |
| sdss/u | 1.07 | 1060 | 79% | 11 401 | 6824 | 3683 | 1156 | 58 |
| sdss/g | 0.88 | 2055 | 71% | 12 284 | 9753 | 7243 | 3861 | 413 |
| sdss/r | 0.75 | 2865 | 65% | 12 534 | 10 796 | 8885 | 5834 | 1157 |
| sdss/i | 0.72 | 3055 | 64% | 12 573 | 10 965 | 9170 | 6228 | 1388 |
| sdss/z | 0.66 | 3430 | 62% | 12 636 | 11 246 | 9656 | 6936 | 1890 |
Notes. Values of the slope of the SSP luminosity evolution ℓλ,IMF(t∗) when modeled as a power law α (see below), the mean age of ℓλ,IMF(t∗) denoted as ⟨t∗⟩λ, the percentage of the sensitivity of ℓλ,IMF(t∗) in the 0 to ⟨t∗⟩λ age range, and the ages where the sensitivity to ℓλ,IMF(t∗) reaches a x% value of the total sensitivity, 
, for 99, 95, 90, 80, and 50% for the set of bands used in this work. The results assume that ℓλ,IMF(t∗) is flat up to 3 Myr and follows a decreasing power law with exponent α for older ages up to tage = 13 Gyr. The upper part of the table shows the generic α values used in this section for different bands, guided by the results in Fig. 1. The lower part of the table shows α values chosen a posteriori to roughly fit the results of the detailed computations presented in Sect. 3.3 (Table 2).
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