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

Bulletin of the American Physical Society

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APS April Meeting 2022

Volume 67, Number 6

Saturday–Tuesday, April 9–12, 2022; New York

Session K16: Simulations of Binary Neutron Stars

1:30 PM–3:06 PM, Sunday, April 10, 2022
Room: 16th Floor Sky Lobby

Sponsoring Units: DGRAV DAP
Chair: Zachariah Etienne, University of Idaho

Abstract: K16.00002 : Handing-Off the Outcome of Binary Neutron Star Mergers for Accurate and Long-Term Post-Merger Simulations*

1:42 PM–1:54 PM

Abstract

Presenter:

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

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, 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
(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
(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)

Collaboration:

compact-binaries (https://compact-binaries.org/)

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.

*NASA TCAN grant No. 80NSSC18K1488

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