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Showing 1–13 of 13 results
Advanced filters: Author: M. Güdel Clear advanced filters

  • The maturation of low-frequency radio astronomy instruments has further opened the magnetic environment of stars to investigation, yielding indications of star–planet interactions and coronal mass ejections in stellar systems other than our own.

    • J. R. Callingham
    • B. J. S. Pope
    • P. Zarka
    Reviews
    Nature Astronomy
    Volume: 8, P: 1359-1372

  • ILT J1101 is a white dwarf–M dwarf binary that emits minute-duration radio pulses with a 2-h periodicity. The period of the radio pulses is linked to the orbital period of the binary, rather than the rotation period of the stellar components.

    • I. de Ruiter
    • K. M. Rajwade
    • S. Mahadevan
    ResearchOpen Access
    Nature Astronomy
    Volume: 9, P: 672-684

  • Simultaneous observations of TRAPPIST-1 b from JWST at 12.8 and 15 μm indicate that it is probably a bare rock with a mineral-rich surface. However, an alternative scenario with a CO2-rich atmosphere and hazes could also explain the observations.

    • Elsa Ducrot
    • Pierre-Olivier Lagage
    • Gillian Wright
    Research
    Nature Astronomy
    Volume: 9, P: 358-369

  • The authors present 19 detections of coherent low-frequency radio emission from M dwarfs using the Low Frequency Array. The sample includes both chromospherically active and quiescent stars, but radio luminosities are independent of coronal and chromospheric activity indicators.

    • J. R. Callingham
    • H. K. Vedantham
    • A. Drabent
    Research
    Nature Astronomy
    Volume: 5, P: 1233-1239

  • Stellar winds of main-sequence stars are extremely important for the evolution of both stars and planets, yet they are challenging to detect. Here a detection of charge-exchange X-ray emission from stellar winds from three main-sequence stars is presented, along with derived mass-loss rates.

    • K. G. Kislyakova
    • M. Güdel
    • S. Boro Saikia
    Research
    Nature Astronomy
    Volume: 8, P: 596-605

  • 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

  •  Observations with the sensitive mid-infrared spectrometer MIRI on board JWST reveal the presence of a water vapour reservoir in the terrestrial plant-forming zone of the young planetary system PDS 70.

    • G. Perotti
    • V. Christiaens
    • G. Wright
    ResearchOpen Access
    Nature
    Volume: 620, P: 516-520

  • The close binary Algol system contains a radio-bright KIV sub-giant star in a very close and rapid orbit with a main sequence B8 star. Evidence points to the existence of an extended, complex coronal magnetosphere originating at the cooler K subgiant, but the detailed morphology of the subgiant's corona and its possible interaction with its companion are unknown. Multi-epoch radio imaging of the Algol system now reveals a large coronal loop suggestive of a persistent asymmetric magnetic field structure aligned between the two stars.

    • W. M. Peterson
    • R. L. Mutel
    • W. M. Goss
    Research
    Nature
    Volume: 463, P: 207-209

  • Near-infrared imagery and spectroscopy from JWST of the Herbig-Haro 211 system, an analogue of the young Sun, reveals  supersonic jets of hot molecules that can explain the origin of the ‘green fuzzies’ phenomenon.

    • T. P. Ray
    • M. J. McCaughrean
    • G. Wright
    ResearchOpen Access
    Nature
    Volume: 622, P: 48-52

  • The inner four planets of the TRAPPIST-1 system experienced induction heating due to magnetic interaction with their host star. This led them to experience increased volcanic activity, outgassing and potentially a subsurface magma ocean.

    • K. G. Kislyakova
    • L. Noack
    • M. Güdel
    Research
    Nature Astronomy
    Volume: 1, P: 878-885