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20112026
most citedThe Fourteenth Data Release of the Sloan Digital Sky Survey: First Spectroscopic Data from the extended Baryon Oscillation Spectroscopic Survey and from the second phase of the Apache Point Observatory Galactic Evolution Experiment

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astro-ph.SR2026

Carbon in J0815+4729: Casting a shadow of doubt on the interpretation of CH absorption in the most primitive stars

Junbo Zhang, Carlos Allende Prieto, Yeisson Osorio +7

Aims. We revisit the carbon abundance in the primitive iron-poor star J0815+4729 ([Fe/H] = -5.49). J0815+4729 is so carbon-enhanced and oxygen-rich that, in addition to CH and C2 m…