My conversation with Bergemann (MPIA) yesterday and a conversation with Fouesneau (MPIA) today made me think that it should be possible to do a complete search of the ESA Gaia XP spectra for zero-metallicity (and I mean primordial-abundances) stars. The spectra are easy to compute, and the hypothesis tests against normal stellar models are all set up already in the codes run at MPIA. Let's do this and find the elusive (literally zero membership, apparently) population-III stars in the Milky Way.
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