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Showing 1–8 of 8 results
Advanced filters: Author: Simon Portegies Zwart Clear advanced filters

  • Supernova 2006gy in the galaxy NGC 1260 is the most luminous one recorded. Its progenitor might have been a very massive star, but that is incompatible with hydrogen in the spectrum of the supernova. Instead, it might have arisen from the merger of two massive stars. However, the collision frequency of massive stars in a dense and young cluster is sufficient to provide a reasonable chance that SN 2006gy resulted from such a bombardment.

    • Simon F. Portegies Zwart
    • Edward P. J. van den Heuvel
    Research
    Nature
    Volume: 450, P: 388-389

  • An astrometric analysis of Gaia data identified two waves of massive runaway stars that have been dynamically ejected from the young cluster R136 in the Large Magellanic Cloud.

    • Mitchel Stoop
    • Alex de Koter
    • Steven Rieder
    Research
    Nature
    Volume: 634, P: 809-812

  • The rocky disk surrounding the young Sun may have experienced a close flyby of another star. Simulations show that a highly inclined flyby of a star slightly smaller than the Sun at 100 au almost perfectly reproduces the orbits of the numerous small objects beyond Neptune.

    • Susanne Pfalzner
    • Amith Govind
    • Simon Portegies Zwart
    ResearchOpen Access
    Nature Astronomy
    Volume: 8, P: 1380-1386

  • Averting the imminent climate crisis requires large reductions in greenhouse gas emissions within this decade. To provide a benchmark for reduction and to identify the main sources, we estimate the carbon footprint of astronomy research in the Netherlands over 2019.

    • Floris van der Tak
    • Leo Burtscher
    • Arno Schoenmakers
    Comments & Opinion
    Nature Astronomy
    Volume: 5, P: 1195-1198

  • Computer use in astronomy continues to increase, and so also its impact on the environment. To minimize the effects, astronomers should avoid interpreted scripting languages such as Python, and favour the optimal use of energy-efficient workstations.

    • Simon Portegies Zwart
    Comments & Opinion
    Nature Astronomy
    Volume: 4, P: 819-822