Direct detection of ionizing photons from z~6 faint galaxies yields escape fraction ~0.8 and log ξ_ion^true = 25.86, implying higher IGM transparency and that young low-metallicity stars in such galaxies can reionize the universe.
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New stack-based strong-line calibrations from ~1500 spectra yield mass-metallicity relations at z=1-10 with decreasing metallicity toward higher redshift and no slope change, plus 50 EMPG candidates at 1-4% solar metallicity showing large scatter and opposite sSFR trends.
A transition to low-opacity SNe-produced dust at z>9 reproduces the observed low attenuation and UV luminosity function excess in early galaxies.
New empirical calibrations between 19 emission-line ratios and oxygen abundance are derived from direct electron-temperature measurements in 139 star-forming galaxies at z=1.4-10.6.
Semi-numerical simulations plus Fisher analysis show that REACH-like observations of the 21-cm global signal can place meaningful constraints on the mass and star-formation efficiency of Population III stars.
A review of theoretical models for the first stars and observational strategies including JWST searches, near-field studies, and lensing, noting growing candidates and narrowing parameter space.
citing papers explorer
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The Great Escape of ionizing photons during Cosmic Morning
Direct detection of ionizing photons from z~6 faint galaxies yields escape fraction ~0.8 and log ξ_ion^true = 25.86, implying higher IGM transparency and that young low-metallicity stars in such galaxies can reionize the universe.
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Inferring population III star properties from the 21-cm global signal
Semi-numerical simulations plus Fisher analysis show that REACH-like observations of the 21-cm global signal can place meaningful constraints on the mass and star-formation efficiency of Population III stars.