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Showing 1–4 of 4 results
Advanced filters: Author: Hakim Atek Clear advanced filters

  • An analysis of eight ultra-faint galaxies during the epoch of reionization with absolute magnitudes between −17 mag and −15  mag shows that most of the photons that reionized the Universe come from dwarf galaxies.

    • Hakim Atek
    • Ivo Labbé
    • Katherine E. Whitaker
    Research
    Nature
    Volume: 626, P: 975-978

  • The main observational signature of star-forming galaxies at the highest redshifts is the Lyman-α (Lyα) emission line. But Lyα photons scatter in the neutral interstellar medium of their host galaxies, and may therefore be greatly absorbed by interstellar dust. It is now shown that the average escaping fraction of Lyα photons from star-forming galaxies at redshift z = 2.2 is just 5 per cent. This implies that numerous conclusions based on Lyα-selected samples will require upwards revision by an order of magnitude.

    • Matthew Hayes
    • Göran Östlin
    • Jens Melinder
    Research
    Nature
    Volume: 464, P: 562-565

  • JWST/NIRSpec observations of Abell2744-QSO1 show a high black-hole-to-host mass ratio in the early Universe, which indicates that we are seeing the black hole in a phase of rapid growth, accreting at 30% of the Eddington limit.

    • Lukas J. Furtak
    • Ivo Labbé
    • Christina C. Williams
    Research
    Nature
    Volume: 628, P: 57-61

  • The infrared view of JWST has opened up the early Universe to study. This Perspective summarizes the key developments in our understanding of the high-redshift Universe from the first 18 months of JWST observations.

    • Angela Adamo
    • Hakim Atek
    • Antonella Nota
    Reviews
    Nature Astronomy
    Volume: 9, P: 1134-1147