A Pop III.1-driven early ionization phase at z=20 yields τ=0.087 consistent with pkSZ and Lyα constraints, potentially resolving BAO-CMB tensions on neutrino mass.
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Two z~6.6 galaxies host overmassive black holes and show remnant ionized bubbles from recent quasar episodes, with BH-to-stellar mass ratios 400-800 times above the local relation.
Simulations show recombination-weighted clumping is systematically lower than density-based measures, density-only prescriptions overpredict rates by 1.29-1.84 depending on redshift, and a new phase-space clumping factor isolates thermal and ionization effects at fixed density.
The Lumina simulation shows that explicit light-cone integrations produce a CMB optical depth 7% higher than volume-weighted ionization histories, with the excess accumulating near redshift 8 and mass-weighted estimates capturing most of the difference.
Simulations show that bursty supernova feedback produces fewer bright [OIII] emitters by z=5 than smooth feedback due to less effective metal enrichment, while [OIII] traces shock-heated and radiatively ionized gas.
citing papers explorer
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Fireworks at Cosmic Dawn: relieving BAO-CMB tensions with the Pop III.1 Flash
A Pop III.1-driven early ionization phase at z=20 yields τ=0.087 consistent with pkSZ and Lyα constraints, potentially resolving BAO-CMB tensions on neutrino mass.
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The Lumina Project: CMB Optical Depth Fluctuations from Patchy Reionization
The Lumina simulation shows that explicit light-cone integrations produce a CMB optical depth 7% higher than volume-weighted ionization histories, with the excess accumulating near redshift 8 and mass-weighted estimates capturing most of the difference.