Impact of nuclear reactions on gravitational waves from neutron star mergers
Impact of nuclear reactions on gravitational waves from neutron star mergers
Nuclear reactions may affect gravitational-wave signals from neutron-star mergers, but the impact is uncertain. To indicate the significance of this effect, we compare two numerical simulations representing intuitive extremes. In one case, reactions happen instantaneously. In the other case, they occur on timescales much slower than the evolutionary timescale. We show that, while the differences in the two gravitational-wave signals are small, the mismatch between them satisfies the condition for distinguishability using the Einstein Telescope noise curve, assuming that the neutron-star equation of state can be well constrained by experiments or by the postmerger signal of the event. This suggests that, to avoid systematic errors in equation of state parameters inferred from observed signals, we need to accurately implement nuclear reactions in future simulations.
Hammond, P.
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Hawke, I.
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Andersson, N.
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21 February 2023
Hammond, P.
2bd2a2cc-4d3a-40d9-a86f-c1f2aac935be
Hawke, I.
fc964672-c794-4260-a972-eaf818e7c9f4
Andersson, N.
2dd6d1ee-cefd-478a-b1ac-e6feedafe304
Hammond, P., Hawke, I. and Andersson, N.
(2023)
Impact of nuclear reactions on gravitational waves from neutron star mergers.
Physical Review D, 107 (4), [043023].
(doi:10.48550/arXiv.2205.11377).
Abstract
Nuclear reactions may affect gravitational-wave signals from neutron-star mergers, but the impact is uncertain. To indicate the significance of this effect, we compare two numerical simulations representing intuitive extremes. In one case, reactions happen instantaneously. In the other case, they occur on timescales much slower than the evolutionary timescale. We show that, while the differences in the two gravitational-wave signals are small, the mismatch between them satisfies the condition for distinguishability using the Einstein Telescope noise curve, assuming that the neutron-star equation of state can be well constrained by experiments or by the postmerger signal of the event. This suggests that, to avoid systematic errors in equation of state parameters inferred from observed signals, we need to accurately implement nuclear reactions in future simulations.
Text
2205.11377
- Accepted Manuscript
Available under License Other.
Text
PhysRevD.107.043023 (1)
- Version of Record
Available under License Other.
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Accepted/In Press date: 19 January 2023
e-pub ahead of print date: 21 February 2023
Published date: 21 February 2023
Additional Information:
Funding Information:
N. A. and I. H. are grateful for support from STFC via Grants No. ST/R00045X/1 and No. ST/V000551/1. Source files for the modified version of the Einstein Toolkit used in this work can be found at . Parfiles and plotting scripts for the simulations discussed and figures presented in this work can be found at .
Publisher Copyright:
© 2023 American Physical Society.
Identifiers
Local EPrints ID: 477334
URI: http://eprints.soton.ac.uk/id/eprint/477334
ISSN: 2470-0010
PURE UUID: 68f1b4d8-8d4c-4183-9d5b-df55c4c7c9d5
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Date deposited: 05 Jun 2023 16:34
Last modified: 17 Mar 2024 03:02
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P. Hammond
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