Universal relations to measure neutron star properties from targeted r-mode searches
Universal relations to measure neutron star properties from targeted r-mode searches
R-mode oscillations of rotating neutron stars(NS) are promising candidates for continuous gravitational wave (GW) observations. In our recent work, we derived universal relations of the NS parameters, compactness and dimensionless tidal deformability with the r-mode frequency. In this work, we investigate how these universal relations can be used to infer various NS intrinsic parameters following a successful detection of the r-modes. In particular, we show that for targeted r-mode searches, these universal relations along with the "I-Love-Q" relation can be used to estimate both the moment of inertia and the distance of the NS thus breaking the degeneracy of distance measurement for continuous gravitational wave(CGW) observations. We also discuss that with a prior knowledge of the distance of the NS from electromagnetic observations, these universal relations can also be used to constrain the dense matter equation of state (EOS) inside NS. We quantify the accuracy to which such measurements can be done using the Fisher information matrix for a broad range of possible, unknown parameters, for both the a-LIGO and Einstein Telescope (ET) sensitivities.
gr-qc, astro-ph.HE
448-454
Ghosh, Suprovo
4408b6bd-fbf0-4ed7-a446-e602f5cca92d
11 August 2023
Ghosh, Suprovo
4408b6bd-fbf0-4ed7-a446-e602f5cca92d
Ghosh, Suprovo
(2023)
Universal relations to measure neutron star properties from targeted r-mode searches.
Monthly Notices of the Royal Astronomical Society, 525 (1), .
(doi:10.1093/mnras/stad2355).
Abstract
R-mode oscillations of rotating neutron stars(NS) are promising candidates for continuous gravitational wave (GW) observations. In our recent work, we derived universal relations of the NS parameters, compactness and dimensionless tidal deformability with the r-mode frequency. In this work, we investigate how these universal relations can be used to infer various NS intrinsic parameters following a successful detection of the r-modes. In particular, we show that for targeted r-mode searches, these universal relations along with the "I-Love-Q" relation can be used to estimate both the moment of inertia and the distance of the NS thus breaking the degeneracy of distance measurement for continuous gravitational wave(CGW) observations. We also discuss that with a prior knowledge of the distance of the NS from electromagnetic observations, these universal relations can also be used to constrain the dense matter equation of state (EOS) inside NS. We quantify the accuracy to which such measurements can be done using the Fisher information matrix for a broad range of possible, unknown parameters, for both the a-LIGO and Einstein Telescope (ET) sensitivities.
Text
2304.12356v2
- Accepted Manuscript
Text
stad2355
- Version of Record
More information
Accepted/In Press date: 31 July 2023
e-pub ahead of print date: 3 August 2023
Published date: 11 August 2023
Additional Information:
8 pages, 4 figures, Accepted in MNRAS
Keywords:
gr-qc, astro-ph.HE
Identifiers
Local EPrints ID: 500955
URI: http://eprints.soton.ac.uk/id/eprint/500955
ISSN: 1365-2966
PURE UUID: 0935469d-6c12-45e6-a622-00dfce923a70
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Date deposited: 19 May 2025 17:17
Last modified: 22 Aug 2025 02:46
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Author:
Suprovo Ghosh
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