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Showing 1–9 of 9 results
Advanced filters: Author: Tommaso Treu Clear advanced filters

  • JWST detections of Si, C and Fe absorption lines in a bright z = 9.31 galaxy with a two-component clump structure suggest that mergers contributed to the rapid build-up of mass and chemical enrichment soon after the Big Bang.

    • Kristan Boyett
    • Michele Trenti
    • Benedetta Vulcani
    Research
    Nature Astronomy
    Volume: 8, P: 657-672

  • A faint galaxy has been detected in the very early Universe thanks to deep observations and a massive cluster gravitationally magnifying its emission. One out of only five such galaxies known, this detection constrains how the Universe was reionized.

    • Austin Hoag
    • Maruša Bradacˇ
    • Tim Schrabback
    Research
    Nature Astronomy
    Volume: 1, P: 1-6

  • 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

  • Images and spectroscopy obtained by the JWST from two HSC-SSP quasars show massive, compact and disc-like galaxies, indicating that the relation between black holes and their host galaxies was in place less than a billion years after the Big Bang.

    • Xuheng Ding
    • Masafusa Onoue
    • Jinyi Yang
    Research
    Nature
    Volume: 621, P: 51-55

  • An individual star at z = 1.49 is gravitationally lensed and highly magnified by a foreground galaxy cluster. Fluctuations in the star’s emission provide insight on the mass function of intracluster stars, compact objects and the presence of dark-matter subhaloes.

    • Patrick L. Kelly
    • Jose M. Diego
    • Benjamin J. Weiner
    Research
    Nature Astronomy
    Volume: 2, P: 334-342

  • A Kavli Institute for Theoretical Physics workshop in July 2019 directed attention to the Hubble constant discrepancy. New results showed that it does not appear to depend on the use of any one method, team or source. Proposed solutions focused on the pre-recombination era.

    • Licia Verde
    • Tommaso Treu
    • Adam G. Riess
    News & Views
    Nature Astronomy
    Volume: 3, P: 891-895