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Showing 1–14 of 14 results
Advanced filters: Author: Henrik Melin Clear advanced filters

  • JWST has detected \({{\rm{H}}}_{3}^{+}\) and auroral emissions at Neptune—the only giant planet in the Solar System for which they had proved to be elusive up to now. The observations reveal a factor-of-two cooling of Neptune’s upper atmosphere compared with Voyager 2 data, indicative of energy balance processes acting on a shorter timescale than solar forcing.

    • Henrik Melin
    • Luke Moore
    • Katie L. Knowles
    ResearchOpen Access
    Nature Astronomy
    Volume: 9, P: 666-671

  • JWST has revealed unexpected and complex emissions structures in the upper atmosphere of Jupiter, above the Great Red Spot. These features suggest that different atmospheric layers are strongly coupled by gravity waves.

    • Henrik Melin
    • J. O’Donoghue
    • M. R. Showalter
    ResearchOpen Access
    Nature Astronomy
    Volume: 8, P: 1000-1007

  • JWST and Keck II spectral observations of Saturn’s moon Titan reveal methyl (CH3) as well as non-local thermodynamic equilibrium emission bands of CO and CO2. Imaging shows clouds in Titan’s northern hemisphere at several epochs, with some appearing to evolve in altitude.

    • Conor A. Nixon
    • Bruno Bézard
    • Robert A. West
    Research
    Nature Astronomy
    Volume: 9, P: 969-981

  • The upper atmospheres of all the giant planets are hotter than models predict. Analysis of Cassini Grand Finale observations of Saturn provide evidence that heat generated by the aurora is responsible.

    • Henrik Melin
    News & Views
    Nature Astronomy
    Volume: 4, P: 837-838

  • Planetary aurorae are formed by energetic charged particles streaming along the planet's magnetic field lines into the upper atmosphere from the surrounding space environment. At Saturn only the main auroral oval has been observed, but this paper reports the discovery of a secondary oval, ∼25 per cent as bright as the main oval.

    • Tom Stallard
    • Steve Miller
    • Michele Dougherty
    Research
    Nature
    Volume: 453, P: 1083-1085

  • New northern aurora emissions on Uranus in the infrared spectrum are detected after a 30-year search. The emissions, observed close to equinox, are most likely caused by the 88% increase in upper atmosphere column density.

    • Emma M. Thomas
    • Henrik Melin
    • Steve Miller
    ResearchOpen Access
    Nature Astronomy
    Volume: 7, P: 1473-1480

  • James Webb Space Telescope observations of Jupiter have unveiled the presence of a narrow and intense atmospheric jet in the equator of the planet near the tropopause. The jet’s speed of 500 km h−1 doubles the speed of the lower clouds. This new jet aligns with temperature and wind oscillations in Jupiter’s stratosphere.

    • Ricardo Hueso
    • Agustín Sánchez-Lavega
    • Kunio M. Sayanagi
    ResearchOpen Access
    Nature Astronomy
    Volume: 7, P: 1454-1462

  • Stig Bojesen, Georgia Chenevix-Trench, Alison Dunning and colleagues report common variants at the TERT-CLPTM1L locus associated with mean telomere length measured in whole blood. They also identify associations at this locus to breast or ovarian cancer susceptibility and report functional studies in breast and ovarian cancer tissue and cell lines.

    • Stig E Bojesen
    • Karen A Pooley
    • Alison M Dunning
    Research
    Nature Genetics
    Volume: 45, P: 371-384

  • A region on chromosome 19p13 is associated with the risk of developing ovarian and breast cancer. Here, the authors genotyped SNPs in this region in thousands of breast and ovarian cancer patients and identified SNPs associated with three genes, which were analysed with functional studies.

    • Kate Lawrenson
    • Siddhartha Kar
    • Simon A. Gayther
    ResearchOpen Access
    Nature Communications
    Volume: 7, P: 1-22

  • A dark, ribbon-like structure at Jupiter’s magnetic equator marks a depletion of ionospheric H3+ caused by a lack of photoelectrons. These photoelectrons, which collide with molecular hydrogen to form H3+, are deviated away by magnetic field lines.

    • Tom S. Stallard
    • Angeline G. Burrell
    • Rosie E. Johnson
    Research
    Nature Astronomy
    Volume: 2, P: 773-777