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Handing-Off the Outcome of Binary Neutron Star Mergers for Accurate and Long-Term Post-Merger Simulations

ORAL

Abstract

We present the HandOff, a set of computational tools that enables the transition of a general relativistic magnetohydrodynamic (GRMHD) simulation between two numerical codes, IllinoisGRMHD and Harm3d. While the first code evolves the equations of full dynamical General Relativity, making use of a Cartesian grid with adaptive-mesh refinement, the second code specializes in modeling black hole accretion disks in static spacetimes over long timescales, making use of general coordinate systems with spherical topology. The HandOff is particularly interesting for transitioning the outcomes of binary neutron star mergers (BNS) to a grid better suited to the geometry and requirements of the post-merger. We demonstrate that the HandOff allows for a smooth and reliable transition of GRMHD fields and spacetime data, enabling us to efficiently and reliably evolve BNS dynamics well beyond merger.

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Publication: Recently submitted to PRD and arXiv.

Presenters

  • Federico G Lopez Armengol

    Rochester Institute of Technology

Authors

  • Federico G Lopez Armengol

    Rochester Institute of Technology

  • Zachariah B Etienne

    University of Idaho

  • Scott C Noble

    NASA Goddard Space Flight Center

  • Bernard J Kelly

    University of Maryland, Baltimore County

  • Leonardo Werneck

    University of Idaho

  • Brendan Drachler

    Rochester Institute of Technology

  • Manuela Campanelli

    Rochester Institute of Technology

  • Federico Cipolletta

    Rochester Institute of Technology

  • Yosef Zlochower

    Rochester Institute of Technology

  • Ariadna Berthier

    Center for Interdisciplinary Exploration and Research in Astrophysics (CIERA), 1800 Sherman Ave., Evanston, IL 60201, USA, UCSC

  • Lorenzo Enoggi

    Center for Computational Relativity and Gravitation,Rochester Institute of Technology, Rochester, New York 14623, USA

  • Mark J Avara

    Univ of Cambridge

  • Riccardo Ciolfi

    INAF-Osservatorio Astronomico di Padova, INAF, Osservatorio Astronomico di Padova, Vicolo dell'Osservatorio 5, I-35122 Padova, Italy

  • Joshua A Faber

    Rochester Institute of Technology

  • Fiaco Grace

    Center for Computational Relativity and Gravitation,Rochester Institute of Technology, Rochester, New York 14623, USA

  • Bruno Giacomazzo

    University of Milan, Bicocca

  • Tanmayee Gupte

    Rochester Institute of Technology

  • Trung Ha

    Rochester Institute of Technology

  • Julian H Krolik

    Johns Hopkins University, Physics and Astronomy Department, Johns Hopkins University, Baltimore, MD 21218, USA

  • Vassilios Mewes

    National Center for Computational Sciences, Oak Ridge National Laboratory,P.O. Box 2008, Oak Ridge, TN 37831-6164, USA

  • Richard O’Shaughnessy

    RIT, Center for Computational Relativity and Gravitation,Rochester Institute of Technology, Rochester, New York 14623, USA

  • Jesús M Rueda-Becerril

    Center for Computational Relativity and Gravitation,Rochester Institute of Technology, Rochester, New York 14623, USA

  • Jeremy Schnittman

    NASA Goddard Space Flight Center