Read the October issue

This month we look at star formation in Ophiuchus (pictured right), the middle corona of the Sun, the jet structure of Centaurus A (cover) and much more...

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  • A population study of near-infrared spectra of 19 hot giant planets shows a correlation between the strength of the 1.4 μm water band and temperature, which is broadly regulated by irradiation. However, the observed scatter around the mean is indicative of the effect of individual planetary formation pathways on the composition.

    • Megan Mansfield
    • Michael R. Line
    • Gael M. Roudier
    Letter
  • From its optical light curve, the white dwarf in the binary system TW Pictoris appears to be switching between two different intensities of accretion on timescales of hours. This behaviour is reminiscent of that seen in transitional millisecond pulsars, where the switching occurs several times a minute.

    • S. Scaringi
    • D. de Martino
    • A. Papitto
    Letter
  • Globular cluster NGC 2005 in the Large Magellanic Cloud (LMC) bears the elemental hallmarks of being an accreted object: a surviving fragment of a galaxy that fell into the LMC long enough ago to have erased any dynamical signature of accretion.

    • A. Mucciarelli
    • D. Massari
    • L. Origlia
    Letter
  • LOFAR observations of a galaxy group reveal multiple generations of cosmic-ray bubbles. The bubble buoyancy power offsets the radiative cooling of the intragroup medium, while magnetic fields prevent mixing between the bubbles and the external medium.

    • M. Brienza
    • T. W. Shimwell
    • C. Tasse
    Letter
  • While pulsar timing observations are currently unable to distinguish a binary black hole astrophysical foreground from a cosmological background, integrated bounds on the ultra-low-frequency gravitational wave spectrum from other cosmological probes may help to break this degeneracy.

    • Christopher J. Moore
    • Alberto Vecchio
    Letter
  • 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
    Letter

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