Volume 1 Issue 7, July 2017

Volume 1 Issue 7

Spinning bullets from a young gun

Observations of a narrow, high-velocity jet launched from the innermost regions of a protostar/disk system reveal the presence of spinning clumps of material within the jet. This putative rotation implies that the jet removes angular momentum from the disk, thus allowing disk material to accrete onto the central protostar.

See Lee et al. 1, 0152 (2017).

ALMA (ESO/NAOJ/NRAO), Chin-Fei Lee (ASIAA). Cover art: Alex Wing

Editorial

  • Editorial |

    With six months behind us, we would like to thank everyone who has submitted a paper, written for us or refereed for us. We take this opportunity to clarify our policies and quell some enduring misconceptions.

Correspondence

  • Correspondence |

    Superdiffusive transport could have a crucial role in explaining the flat radio spectra of reaccelerated fossil electrons observed in clusters. Thus, a theory developed for heliospheric shocks can have a wide application in astrophysics.

    • Gaetano Zimbardo
    •  & Silvia Perri

Comment

  • Comment |

    US astronomy decadal surveys advise government on how to optimize the scientific return on national investments in astronomy research. The 2020 survey will guide our community into the future, but current strains in an otherwise world-leading astronomy programme may affect this collective exercise.

    • Adam Burrows
  • Obituary |

    A pioneer in the field of astrochemistry, Patrick Thaddeus discovered dozens of exotic molecules in space and helped revolutionize our view of the interstellar medium and star formation.

    • Thomas Dame
  • Obituary |

    Charles Malcolm Walmsley passed away on 1 May 2017. He made numerous fundamental contributions to the physics and chemistry of star formation and the interstellar medium. He was an exceptional scientist, a highly esteemed colleague and a true gentleman.

    • Karl Menten
    •  & Riccardo Cesaroni
  • Mission Control |

    NASA's Juno mission to Jupiter has just returned its early science results after spending a year orbiting the ‘King of the Solar System’. Principal Investigator Scott Bolton summarizes what we have learnt.

    • Scott J. Bolton

Books & Arts

Research Highlights

News & Views

  • News & Views |

    There is no single approach to the quantization of gravity. Rather, multiple models are based on various assumptions, and experimental tests of Planck-scale physics present a particular challenge.

    • David Mattingly
  • News & Views |

    Analysis of Hubble Space Telescope observations shows that the well-known alignment between the central galaxy of a galaxy cluster and its host cluster has been in place for at least ten billion years.

    • Cristóbal Sifón
  • News & Views |

    High angular resolution ALMA observations appear to confirm jets as a solution to the classical angular momentum problem of star formation, but the jury is still out.

    • Deirdre Coffey

Perspective

Research

  • Letter |

    Using Si18O as a velocity tracer, evidence is reported for a rotating outflow driven by a magneto-centrifugal disk wind launched by a high-mass young stellar object. This rotation is a signature of the removal of angular momentum by an outflow.

    • Tomoya Hirota
    • , Masahiro N. Machida
    • , Yuko Matsushita
    • , Kazuhito Motogi
    • , Naoko Matsumoto
    • , Mi Kyoung Kim
    • , Ross A. Burns
    •  & Mareki Honma
  • Letter |

    Disk winds from the surfaces of protoplanetary disks remove angular momentum from radii outside ~10 au. Lee et al. show that residual angular momentum is removed at radii <10 au via highly collimated jets launched at the 0.05 au scale, enabling accretion.

    • Chin-Fei Lee
    • , Paul. T. P Ho
    • , Zhi-Yun Li
    • , Naomi Hirano
    • , Qizhou Zhang
    •  & Hsien Shang
  • Article |

    Using an innovative method, the mass of a pulsar can be constrained using the maximum ‘glitch’ in the star’s rotational frequency: the bigger the glitch, the lower the mass. This method is used to estimate the mass of all observed glitchers.

    • P. M. Pizzochero
    • , M. Antonelli
    • , B. Haskell
    •  & S. Seveso
  • Letter |

    The brightest galaxy in a cluster is known to align with its host filament in the local Universe. Here this correlation is extended to when the Universe was just a third of its current age. With this, the privileged history of brightest cluster galaxies is reinforced.

    • Michael J. West
    • , Roberto De Propris
    • , Malcolm N. Bremer
    •  & Steven Phillipps
  • Letter |

    Coevolving millions of cold dark matter particles and neutrinos within one N-body simulation, TianNu, shows that regions of similar dark matter density can have different neutrino densities. These density variations may have an effect on the cosmic structure.

    • Hao-Ran Yu
    • , J.D. Emberson
    • , Derek Inman
    • , Tong-Jie Zhang
    • , Ue-Li Pen
    • , Joachim Harnois-Déraps
    • , Shuo Yuan
    • , Huan-Yu Teng
    • , Hong-Ming Zhu
    • , Xuelei Chen
    • , Zhi-Zhong Xing
    • , Yunfei Du
    • , Lilun Zhang
    • , Yutong Lu
    •  & XiangKe Liao
  • Article |

    Ultrarelativistic photons and neutrinos from gamma-ray bursts offer a testbed for quantum gravity effects that would lead to an energy dependence of the travel times. A statistical analysis of astrophysical data shows that this behaviour may have been observed.

    • Giovanni Amelino-Camelia
    • , Giacomo D’Amico
    • , Giacomo Rosati
    •  & Niccoló Loret