General Relativistic Stability and Gravitational Wave Content of Rotating Triaxial Neutron Stars
Triaxial neutron stars can be sources of continuous gravitational radiation detectable by ground-based interferometers. The amplitude of the emitted gravitational wave can be greatly affected by the state of the hydrodynamical fluid flow inside the neutron star. In this work, we examine the most tri...
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| Format: | Article |
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MDPI AG
2024-03-01
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| Series: | Symmetry |
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| Online Access: | https://www.mdpi.com/2073-8994/16/3/343 |
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| author | Yufeng Luo Antonios Tsokaros Roland Haas Kōji Uryū |
| author_facet | Yufeng Luo Antonios Tsokaros Roland Haas Kōji Uryū |
| author_sort | Yufeng Luo |
| collection | DOAJ |
| description | Triaxial neutron stars can be sources of continuous gravitational radiation detectable by ground-based interferometers. The amplitude of the emitted gravitational wave can be greatly affected by the state of the hydrodynamical fluid flow inside the neutron star. In this work, we examine the most triaxial models along two sequences of constant rest mass, confirming their dynamical stability. We also study the response of a triaxial figure of quasiequilibrium under a variety of perturbations that lead to different fluid flows. Starting from the general relativistic compressible analog of the Newtonian Jacobi ellipsoid, we perform simulations of Dedekind-type flows. We find that in some cases the triaxial neutron star resembles a Riemann-S-type ellipsoid with minor rotation and gravitational wave emission as it evolves towards axisymmetry. The present results highlight the importance of understanding the fluid flow in the interior of a neutron star in terms of its gravitational wave content. |
| first_indexed | 2024-04-24T17:48:14Z |
| format | Article |
| id | doaj.art-4f4f66f8c2f148589b2d003c5f1a08ae |
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| issn | 2073-8994 |
| language | English |
| last_indexed | 2024-04-24T17:48:14Z |
| publishDate | 2024-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Symmetry |
| spelling | doaj.art-4f4f66f8c2f148589b2d003c5f1a08ae2024-03-27T14:05:32ZengMDPI AGSymmetry2073-89942024-03-0116334310.3390/sym16030343General Relativistic Stability and Gravitational Wave Content of Rotating Triaxial Neutron StarsYufeng Luo0Antonios Tsokaros1Roland Haas2Kōji Uryū3Department of Physics and Astronomy, University of Wyoming, Laramie, WY 82071, USADepartment of Physics, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USADepartment of Physics, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USADepartment of Physics, University of the Ryukyus, Senbaru, Nishihara, Okinawa 903-0213, JapanTriaxial neutron stars can be sources of continuous gravitational radiation detectable by ground-based interferometers. The amplitude of the emitted gravitational wave can be greatly affected by the state of the hydrodynamical fluid flow inside the neutron star. In this work, we examine the most triaxial models along two sequences of constant rest mass, confirming their dynamical stability. We also study the response of a triaxial figure of quasiequilibrium under a variety of perturbations that lead to different fluid flows. Starting from the general relativistic compressible analog of the Newtonian Jacobi ellipsoid, we perform simulations of Dedekind-type flows. We find that in some cases the triaxial neutron star resembles a Riemann-S-type ellipsoid with minor rotation and gravitational wave emission as it evolves towards axisymmetry. The present results highlight the importance of understanding the fluid flow in the interior of a neutron star in terms of its gravitational wave content.https://www.mdpi.com/2073-8994/16/3/343neutron starsstabilitygravitational waves |
| spellingShingle | Yufeng Luo Antonios Tsokaros Roland Haas Kōji Uryū General Relativistic Stability and Gravitational Wave Content of Rotating Triaxial Neutron Stars Symmetry neutron stars stability gravitational waves |
| title | General Relativistic Stability and Gravitational Wave Content of Rotating Triaxial Neutron Stars |
| title_full | General Relativistic Stability and Gravitational Wave Content of Rotating Triaxial Neutron Stars |
| title_fullStr | General Relativistic Stability and Gravitational Wave Content of Rotating Triaxial Neutron Stars |
| title_full_unstemmed | General Relativistic Stability and Gravitational Wave Content of Rotating Triaxial Neutron Stars |
| title_short | General Relativistic Stability and Gravitational Wave Content of Rotating Triaxial Neutron Stars |
| title_sort | general relativistic stability and gravitational wave content of rotating triaxial neutron stars |
| topic | neutron stars stability gravitational waves |
| url | https://www.mdpi.com/2073-8994/16/3/343 |
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