Malaise and remedy of binary boson-star initial data

ORAL

Abstract

Through numerical simulations of boson-star head-on collisions, we explore the quality of binary initial data obtained from the superposition of single-star spacetimes. Our results demonstrate that evolutions starting from a plain superposition of individual boosted boson-star spacetimes are vulnerable to significant unphysical artefacts. These difficulties can be overcome with a simple modification of the initial data suggested in for collisions of oscillatons.

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Publication: https://arxiv.org/abs/2108.11995

Presenters

  • Thomas Helfer

    • Johns Hopkins University

Authors

  • Thomas Helfer

    • Johns Hopkins University

  • Ulrich Sperhake

    • Autonomous University of Barcelona

  • Robin Croft

    • Cambridge University

  • Bo-Xuan Ge

    • King's College London

  • Eugene Lim

    • King's College London

  • Miren Radia

    • Cambridge University