Fig. 16
Average composition of 4.5 Gyr old stars in the solar neighbourhood, elemental (top) and isotopic (bottom) compared to the observed solar composition. Most elements and isotopes are co-produced within a factor of two of their solar value. The corresponding values for the local ISM 4.5 Gyr ago are ~0.1−0.15 dex lower for all elements but H and He. No normalisation of the results is made here.
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