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Showing 1–10 of 10 results
Advanced filters: Author: Pierre Maxted Clear advanced filters

  • The ~200-Myr-old star TOI-2076 hosts a young four-planet system, the orbits and atmospheres of which are still evolving, showing signs of early dynamical reshaping and atmospheric sculpting and offering a rare glimpse of how planetary systems form and transform in their youth.

    • Mu-Tian Wang
    • Fei Dai
    • Alexia Goldenberg
    Research
    Nature Astronomy
    P: 1-12

  • Measurements of a precursor to a low-mass white-dwarf star reveal that such white-dwarf stars probably had a thick hydrogen envelope, which was lost by irradiation or shell flashes in the case of rapidly cooling white-dwarf stars.

    • Pierre F. L. Maxted
    • Aldo M. Serenelli
    • Veronika Schaffenroth
    Research
    Nature
    Volume: 498, P: 463-465

  • A primordial carbon-to-oxygen ratio (C/O) greater than 0.8 in an exoplanet causes a carbide-dominated interior, as opposed to the silicate-dominated composition found on Earth; the atmospheres also can differ from those in the Solar System. The solar C/O is 0.54. This study reports an analysis of spectra from the transiting hot Jupiter WASP-12b that reveals that C/O>1 in its atmosphere, based upon the observed concentrations of the prominent molecules CO, CH4 and H2O.

    • Nikku Madhusudhan
    • Joseph Harrington
    • Richard G. West
    Research
    Nature
    Volume: 469, P: 64-67

  • Precise mass and radius measurements of giant planet WASP-193 b find an extremely low density of 0.059 ± 0.014 g cm−3. Current evolutionary models cannot fully explain such a low density, but the extended atmosphere makes WASP-193 b very suitable for high-precision characterization via JWST.

    • Khalid Barkaoui
    • Francisco J. Pozuelos
    • Richard G. West
    Research
    Nature Astronomy
    Volume: 8, P: 909-919

  • The radial-velocity technique could detect a small gas giant orbiting a binary star and determine its mass: 65.2 ± 11.8 Earth masses. The system also hosts a smaller inner planet, making it one of the few known multiplanetary circumbinary systems.

    • Matthew R. Standing
    • Lalitha Sairam
    • William F. Welsh
    Research
    Nature Astronomy
    Volume: 7, P: 702-714

  • Observations of six transiting planets around the bright nearby star HD 110067 show that they follow a chain of resonant orbits, with three of the planets inferring the presence of large hydrogen-dominated atmospheres.

    • R. Luque
    • H. P. Osborn
    • T. Zingales
    Research
    Nature
    Volume: 623, P: 932-937

  • Archaeogenetic study of ancient DNA from medieval northwestern Europeans reveals substantial increase of continental northern European ancestry in Britain, suggesting mass migration across the North Sea during the Early Middle Ages.

    • Joscha Gretzinger
    • Duncan Sayer
    • Stephan Schiffels
    ResearchOpen Access
    Nature
    Volume: 610, P: 112-119

  • Three planets orbit the Sun-like star ν2 Lupi. CHEOPS data show that all of them are transiting and show remarkable diversity. In particular, dry and gas-poor inner planet b has experienced extensive atmospheric loss, while planets c and d are water rich and have a small gaseous envelope of primordial origin.

    • Laetitia Delrez
    • David Ehrenreich
    • Nicholas A. Walton
    Research
    Nature Astronomy
    Volume: 5, P: 775-787

  • Deep γ-ray observations of the Galactic Centre with arcminute angular resolution show traces of petaelectronvolt protons within the central ten parsecs of our Galaxy; the accelerator of these particles could have provided a substantial contribution to Galactic cosmic rays in the past.

    • A. Abramowski
    • F. Aharonian
    • HESS Collaboration
    Research
    Nature
    Volume: 531, P: 476-479