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Showing 1–8 of 8 results
Advanced filters: Author: Rogier Windhorst Clear advanced filters

  • JWST has revealed many prolate, filamentary galaxies at z ≈ 3–8. Hydrodynamical simulations reproduce this trend only in warm or wave dark matter models, where smooth filamentary accretion dominates over the hierarchical fragmentation seen with cold dark matter.

    • Alvaro Pozo
    • Tom Broadhurst
    • Rogier Windhorst
    Research
    Nature Astronomy
    P: 1-11

  • The observed number counts of high-redshift galaxy candidates have been used to build up a statistical description of star-forming activity at redshift of about z>7. Here it is reported that gravitational lensing is likely to dominate the observed properties of galaxies with redshifts of about z>12, when the instrumental limiting magnitude is expected to be brighter than the characteristic magnitude of the galaxy sample. The number counts could be modified by an order of magnitude. Future surveys will need to be designed to account for a significant gravitational lensing bias in high-redshift galaxy samples.

    • J. Stuart B. Wyithe
    • Haojing Yan
    • Shude Mao
    Research
    Nature
    Volume: 469, P: 181-184

  • The JWST, with the aid of gravitational lensing, confirms the extreme distance of an ultra-faint galaxy at a redshift of 9.79, showing it to have a luminosity typical of the sources responsible for cosmic reionization and highly compact and complex morphology.

    • Guido Roberts-Borsani
    • Tommaso Treu
    • Rogier A. Windhorst
    Research
    Nature
    Volume: 618, P: 480-483

  • A massive star at a redshift of 6.2, corresponding to 900 million years after the Big Bang, is magnified greatly by lensing of the foreground galaxy cluster WH0137–08.

    • Brian Welch
    • Dan Coe
    • Tom Broadhurst
    Research
    Nature
    Volume: 603, P: 815-818