Monster Shocks, Gamma-Ray Bursts, and Black Hole Quasi-normal Modes from Neutron-star Collapse
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1.
California Institute of Technology
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2.
Columbia University
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3.
Max Planck Institute for Astrophysics
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4.
Canadian Institute for Theoretical Astrophysics
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5.
University of Toronto
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6.
Perimeter Institute
- 7. Center for Computational Astrophysics, Flatiron Institute, 162 5th Ave, New York, NY 10010, USA
Abstract
We perform the first magnetohydrodynamic simulation tracking the magnetosphere of a collapsing magnetar. The collapse is expected for massive rotating magnetars formed in merger events and may occur many hours after the merger. Our simulation suggests a novel mechanism for a gamma-ray burst (GRB), which is uncollimated and forms a delayed high-energy counterpart of the merger gravitational waves. The simulation shows that the collapse launches an outgoing magnetospheric shock, and a hot magnetized outflow forms behind the shock. The outflow is baryon free and uncollimated, and its power peaks on a millisecond timescale. Then, the outflow becomes modulated by the ring-down of the nascent black hole, imprinting its kilohertz quasi-normal modes on the GRB tail.
Copyright and License
© 2024. The Author(s). Published by the American Astronomical Society. Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
Acknowledgement
The authors gratefully acknowledge the insightful discussions with A. Levinson, M. Lyutikov, A. Philippov, V. Ravi, R. Sari, L. Sironi, J. Stone, S. Teukolsky, and C. Thompson. A.M.B. and E.R.M. acknowledge support from NASA's ATP program under grant 80NSSC24K1229. E.R.M. acknowledges support by the National Science Foundation under grant Nos. PHY-2309210 and AST-2307394. A.M.B. is supported by NSF AST 2009453, NASA 21-ATP21-0056, and Simons Foundation award No. 446228. B.R. is supported by the Natural Sciences & Engineering Research Council of Canada (NSERC) and by a grant from the Simons Foundation (MP-SCMPS-00001470). Simulations were performed on the NSF Frontera supercomputer under grant AST21006 and on Delta at the National Center for Supercomputing Applications (NCSA) through allocation PHY210074 from the Advanced Cyberinfrastructure Coordination Ecosystem: Services & Support (ACCESS) program, which is supported by National Science Foundation grants #2138259, #2138286, #2138307, #2137603, and #2138296.
Software References
Einstein Toolkit (F. Löffler et al. 2012), Frankfurt/IllinoisGRMHD (Z. B. Etienne et al. 2015; E. R. Most et al. 2019) RNS (N. Stergioulas & J. L. Friedman 1995), kuibit (G. Bozzola 2021), Matplotlib (J. D. Hunter 2007), NumPy (C. R. Harris et al. 2020), qnm (L. Stein 2019), SciPy (P. Virtanen et al. 2020).
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Additional details
- National Science Foundation
- PHY-2309210
- National Science Foundation
- AST-2307394
- National Science Foundation
- AST 2009453
- National Aeronautics and Space Administration
- 21-ATP21-0056
- Simons Foundation
- 446228
- Natural Sciences and Engineering Research Council
- Simons Foundation
- MP-SCMPS-00001470
- Accepted
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2024-09-20Accepted
- Available
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2024-10-07Published online
- Caltech groups
- Walter Burke Institute for Theoretical Physics, Astronomy Department, TAPIR
- Publication Status
- Published