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Fig. 10.

image

Distance-independent two-colour diagram. Simple stellar population colours from the SPoT code are compared to the measured host-galaxy colors (filled yellow circle). Lines and small squares refer to models with metallicity [Fe/H] = −0.7 (blue), [Fe/H] = −0.4 (green), [Fe/H] = 0.0 (violet), [Fe/H] = +0.4 (orange), respectively. Indicative ages are also labelled, from 50 Myr to 14 Gyr. The host galaxy is plotted as a filled red (observed) and yellow (de-reddened) circle. The last value is obtained by applying the value E(B − V)=0.2). No k-correction is applied.

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