New VLT observations of He I* absorbers yield a primordial ³He/⁴He ratio of (1.15^{+0.24}_{-0.21})×10^{-4} consistent with standard Big Bang nucleosynthesis, plus an updated stellar yield scaling factor.
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TwinSpecNet uses empirical paired learning on spectral twins to denoise low-S/N APOGEE spectra and predict stellar parameters and abundances with lower scatter than the standard pipeline.
A revised parallel chemical evolution model with pre-enriched delayed second infall explains the Milky Way's alpha-element abundance patterns, co-evolution phase, and old low-alpha stars from APOGEE data.
Asteroseismic ages from TESS calibrate [Y/Mg] and [C/N] chemical clocks, revealing a radially dependent [Y/Mg]-age relation that is steeper in the outer Galactic disc and flatter inward, with NLTE corrections and evolutionary stage accounting required for accuracy.
citing papers explorer
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Towards a measurement of the primordial helium isotope ratio
New VLT observations of He I* absorbers yield a primordial ³He/⁴He ratio of (1.15^{+0.24}_{-0.21})×10^{-4} consistent with standard Big Bang nucleosynthesis, plus an updated stellar yield scaling factor.
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TwinSpecNet: Extending APOGEE's chemical reach to low-S/N spectra via empirical paired learning
TwinSpecNet uses empirical paired learning on spectral twins to denoise low-S/N APOGEE spectra and predict stellar parameters and abundances with lower scatter than the standard pipeline.
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Co-evolution of the Milky Way high- and low-{\alpha} sequences with chemical evolution models
A revised parallel chemical evolution model with pre-enriched delayed second infall explains the Milky Way's alpha-element abundance patterns, co-evolution phase, and old low-alpha stars from APOGEE data.
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Calibration of the [C/N] and [Y/Mg] chemical clocks with asteroseismic ages from the TESS space mission
Asteroseismic ages from TESS calibrate [Y/Mg] and [C/N] chemical clocks, revealing a radially dependent [Y/Mg]-age relation that is steeper in the outer Galactic disc and flatter inward, with NLTE corrections and evolutionary stage accounting required for accuracy.