The First Galaxies and the Likely Discovery of Their Fossils in the Local Group

Figure 11

(a) Mean metallicity of the stars versus. V-band luminosity for Local Group dSphs plotted against RG05 predictions. They symbols have the same meaning as in Figure 8. In this plot simulated fossils (shown as small squares) are color coded according to their star formation efficiency, 𝑓_∗: red symbols show simulated dwarfs with 𝑓_∗<0.003, blue 0.003≤𝑓_∗≤0.03 and green 𝑓_∗>0.03. (b) Same as (a) but showing the spread of the stellar metallicities in each dwarf (i.e., variance of the metallicity distribution) versus. their V-band luminosity.

(a)

(b)