Table 6
Observed circumstellar excess ratios, based on the naked colors of a 2600 K star.
| Excess ratios | Mean_1 (Curve3) | Sigma_1 (Curve3) | Mean_2 (Gordon) | Sigma_2 (Gordon) |
|---|---|---|---|---|
| E(Ks−A) E(Ks−D) |
0.68 | 0.43 | 0.65 | 0.32 |
| E(Ks−C) E(Ks−D) |
1.04 | 0.17 | 0.97 | 0.05 |
| E(Ks−E) E(Ks−D) |
1.26 | 0.46 | 1.22 | 0.24 |
| E(Ks−W1) E(Ks−W3) |
0.34 | 0.78 | 0.27 | 0.39 |
| E(Ks−W2) E(Ks−W3) |
0.72 | 0.53 | 0.44 | 0.51 |
| E(Ks−W4) E(Ks−W3) |
3.19 | 36.22 | 1.54 | 1.77 |
| E(Ks−[3.6]) E(Ks−[5.8]) |
0.05 | 2.97 | 0.45 | 4.69 |
| E(Ks−[4.5]) E(Ks−[5.8]) |
0.30 | 2.91 | 0.43 | 3.93 |
| E(Ks−8.0) E(Ks−[5.8]) |
1.30 | 0.80 | 1.18 | 1.46 |
Notes. The mean_1 and sigma_1 values are obtained after having dereddened the observed colors with the ![$\[A_{K_{\mathrm{s}}}\]$](/articles/aa/full_html/2024/06/aa47661-23/aa47661-23-eq105.png){kind=small}
values and the revised curve 3 of Messineo et al. (2005). The mean_2 and sigma_2 values are obtained after having dereddened the observed colours with the ![$\[A_{K_{\mathrm{s}}}\]$](/articles/aa/full_html/2024/06/aa47661-23/aa47661-23-eq106.png){kind=small}
values of Messineo et al. (2005) (rescaled to a power law of index −2.1) and the mid-interstellar extinction curve by Gordon et al. (2021). The best ratios (less affected by molecular absorption) are marked in bold.
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