Browse Articles

  • Letter |

    A bright X-ray outburst from a massive star cluster 12.5 kpc from a galactic centre fits the profile of a tidal disruption event (TDE), indicating the likely presence of an intermediate-mass black hole (IMBH). TDEs could be the most effective way of identifying IMBHs.

    • Dacheng Lin
    • , Jay Strader
    • , Eleazar R. Carrasco
    • , Dany Page
    • , Aaron J. Romanowsky
    • , Jeroen Homan
    • , Jimmy A. Irwin
    • , Ronald A. Remillard
    • , Olivier Godet
    • , Natalie A. Webb
    • , Holger Baumgardt
    • , Rudy Wijnands
    • , Didier Barret
    • , Pierre-Alain Duc
    • , Jean P. Brodie
    •  & Stephen D. J. Gwyn
  • Letter |

    By studying the properties of almost 200 disk galaxies, it is shown that modified Newtonian dynamics (MOND), or MOND-like alternative theories of gravity based on the existence of a fundamental acceleration scale, are ruled out as fundamental theories for galaxies at more than 10σ.

    • Davi C. Rodrigues
    • , Valerio Marra
    • , Antonino del Popolo
    •  & Zahra Davari
  • Letter |

    The presence of nanodiamonds in protoplanetary disks correlates strongly with the detection of anomalous microwave emission from the same disks, implying that spinning nanodiamonds rather than polycyclic aromatic hydrocarbons are the source of this puzzling ~30 GHz emission feature.

    • J. S. Greaves
    • , A. M. M. Scaife
    • , D. T. Frayer
    • , D. A. Green
    • , B. S. Mason
    •  & A. M. S. Smith
  • News & Views |

    The Juno spacecraft has detected unprecedented numbers of ‘whistlers’ and ‘sferics’ in its orbits around Jupiter, both indications of high lightning flash rates in the atmosphere of the gas giant planet.

    • Jacob Bortnik
  • Letter |

    The Waves instrument on board the Juno spacecraft has detected ~1,600 lightning strokes in roughly 1 year of close approaches to Jupiter, indicated by low-dispersion rapid whistlers much shorter than those detected by Voyager 1 in Io’s plasma torus.

    • Ivana Kolmašová
    • , Masafumi Imai
    • , Ondřej Santolík
    • , William S. Kurth
    • , George B. Hospodarsky
    • , Donald A. Gurnett
    • , John E. P. Connerney
    •  & Scott J. Bolton
  • Review Article |

    A review of the various techniques to obtain photometric redshifts, from template-fitting to machine learning and hybrid schemes, and a description of the latest results on extragalactic samples and how survey strategy choices impact redshift accuracy.

    • Mara Salvato
    • , Olivier Ilbert
    •  & Ben Hoyle
  • Letter |

    Cassini magnetic field and plasma observations find evidence of magnetic reconnection on the dayside of Saturn’s magnetosphere, which can explain local auroral pulsations and play a role in the transport of energetic particles within rapidly rotating magnetospheres.

    • R. L. Guo
    • , Z. H. Yao
    • , Y. Wei
    • , L. C. Ray
    • , I. J. Rae
    • , C. S. Arridge
    • , A. J. Coates
    • , P. A. Delamere
    • , N. Sergis
    • , P. Kollmann
    • , D. Grodent
    • , W. R. Dunn
    • , J. H. Waite
    • , J. L. Burch
    • , Z. Y. Pu
    • , B. Palmaerts
    •  & M. K. Dougherty
  • Mission Control |

    The Hayabusa2 spacecraft will soon rendezvous with asteroid Ryugu in order to study its composition using remote sensing, a lander, rovers and sample return, explains Elizabeth Tasker.

    • Elizabeth Tasker
  • Editorial |

    With moons holding subsurface oceans, the outer planets are back in focus as the most promising places to find life beyond Earth. In addition to future missions, ongoing data analysis from past missions has an important role to play.

  • Meeting Report |

    Are we alone in the Universe? Is life unique to Earth or a common phenomenon? These fundamental questions represent major puzzles of contemporary science, and were inspiration for a NASA conference on the prebiotic conditions of the early Solar System.

    • Vladimir S. Airapetian
  • Letter |

    Images of 67P's nucleus from the Rosetta spacecraft, together with numerical simulations, show that the jet-like features of cometary comae can be produced by diffuse activity focused by the nucleus topography as well as non-uniform insolation over the surface.

    • X. Shi
    • , X. Hu
    • , S. Mottola
    • , H. Sierks
    • , H. U. Keller
    • , M. Rose
    • , C. Güttler
    • , M. Fulle
    • , S. Fornasier
    • , J. Agarwal
    • , M. Pajola
    • , C. Tubiana
    • , D. Bodewits
    • , C. Barbieri
    • , P. L. Lamy
    • , R. Rodrigo
    • , D. Koschny
    • , M. A. Barucci
    • , J.-L. Bertaux
    • , I. Bertini
    • , S. Boudreault
    • , G. Cremonese
    • , V. Da Deppo
    • , B. Davidsson
    • , S. Debei
    • , M. De Cecco
    • , J. Deller
    • , O. Groussin
    • , P. J. Gutiérrez
    • , S. F. Hviid
    • , W.-H. Ip
    • , L. Jorda
    • , J. Knollenberg
    • , G. Kovacs
    • , J.-R. Kramm
    • , E. Kührt
    • , M. Küppers
    • , L. M. Lara
    • , M. Lazzarin
    • , J. J. Lopez-Moreno
    • , F. Marzari
    • , G. Naletto
    • , N. Oklay
    • , I. Toth
    •  & J.-B. Vincent
  • News & Views |

    Supermassive binary black holes are thought to lie at the centres of merging galaxies. The blazar OJ 287 is the poster child of such systems, showing strong and periodic variability across the electromagnetic spectrum. A new study questions the physical origin of this variability.

    • Zulema Abraham
  • Meeting Report |

    With the ever-growing list of exoplanets fuelling hope for finding life beyond the Solar System, the recent Breakthrough Discuss meeting redirected attention back to our own neighbourhood.

    • John C. Forbes
  • Research Highlight |

    • Luca Maltagliati
  • Letter |

    The hypothesis of an ocean under the icy surface of Jupiter’s moon Europa is strengthened by in-situ evidence of a plume, inferred by Galileo’s magnetic field and plasma density measurements obtained during the spacecraft’s closest flyby to the moon.

    • Xianzhe Jia
    • , Margaret G. Kivelson
    • , Krishan K. Khurana
    •  & William S. Kurth