New stacked spectra of the most metal-poor star known give a stringent carbon upper limit A(C) < 4.68, confirming it is not carbon-enhanced and supporting dust-cooled or fragmentation-based formation of the first low-mass stars.
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SDSS J102915.14+172927.9: Revisiting the chemical pattern
New stacked spectra of the most metal-poor star known give a stringent carbon upper limit A(C) < 4.68, confirming it is not carbon-enhanced and supporting dust-cooled or fragmentation-based formation of the first low-mass stars.