Christoph Gross, Freie Universität Berlin

Read our March issue

This issue takes us to Mars, the TRAPPIST-1 system and beyond, including a Focus on active galactic nucleus outflows and feedback.

Latest Research

  • Letter |

    New hydrodynamical models are used to fit the Fermi-LAT data of the Galactic centre and show that the excess γ-ray emission of the region is better fitted by a non-spherical shape, indicating that it is not caused by dark-matter-related phenomena.

    • Oscar Macias
    • , Chris Gordon
    • , Roland M. Crocker
    • , Brendan Coleman
    • , Dylan Paterson
    • , Shunsaku Horiuchi
    •  & Martin Pohl
  • Article |

    Laboratory analyses on six carbonaceous chondrites suggest the presence of two water sources with different deuterium (D) enrichment levels in the protoplanetary disk: a D-poor inner reservoir and a D-rich water component transferred inward from the outer disk.

    • Laurette Piani
    • , Hisayoshi Yurimoto
    •  & Laurent Remusat
  • Article |

    Pyrene, a polycyclic aromatic hydrocarbon composed of four fused benzene rings, is putatively a key molecule in the formation of 2D carbonaceous structures. Using experimental and computational techniques, Zhao et al. show that pyrene can form in circumstellar conditions.

    • Long Zhao
    • , Ralf I. Kaiser
    • , Bo Xu
    • , Utuq Ablikim
    • , Musahid Ahmed
    • , Dharati Joshi
    • , Gregory Veber
    • , Felix R. Fischer
    •  & Alexander M. Mebel
  • Letter |

    Laboratory experiments explore aerosol formation at conditions that can be found on planets with radii between Earth and Neptune that do not exist in the Solar System but are common elsewhere. Photochemically generated hazes are produced in most cases.

    • Sarah M. Hörst
    • , Chao He
    • , Nikole K. Lewis
    • , Eliza M.-R. Kempton
    • , Mark S. Marley
    • , Caroline V. Morley
    • , Julianne I. Moses
    • , Jeff A. Valenti
    •  & Véronique Vuitton
  • Letter |

    This paper puts into question the standard scenario of a primordial formation for bilobate comets. The authors show that bilobate comets can retain their properties even if they form through collisions of larger bodies, which can happen at any time.

    • Stephen R. Schwartz
    • , Patrick Michel
    • , Martin Jutzi
    • , Simone Marchi
    • , Yun Zhang
    •  & Derek C. Richardson

News & Comment

  • Comment |

    Awareness of light pollution is spreading, but with changing lighting technologies, emissions are shifting to wavelengths our current measuring devices cannot assess well. Community involvement is essential to evaluate changes in sky brightness.

    • Christopher C. M. Kyba
  • Comment |

    Galaxy-scale outflows powered by actively accreting supermassive black holes are routinely detected, and they have been associated with both the suppression and triggering of star formation. Recent observational evidence and simulations are favouring a delayed mechanism that connects outflows and star formation.

    • Giovanni Cresci
    •  & Roberto Maiolino
  • Meeting Report |

    Feedback from active galactic nuclei (AGNs) remains controversial despite its wide acceptance as necessary to regulate massive galaxy growth. Consequently, we held a workshop in October 2017, at Leiden’s Lorentz Center, to distinguish between the reality and myths of feedback.

    • Bernd Husemann
    •  & Chris M. Harrison

Natureevents Directory