Continuous Gravitational Waves from Thermal Mountains on Accreting Neutron Stars: Effect of the Nuclear Pasta Phase
As density increases, the shape of nuclei transitions to nonspherical “nuclear pasta” structures. The physical properties of the nuclear pasta, such as thermal conductivity and elasticity, have implications for detecting continuous gravitational waves from a rapidly rotating neutron star. In this wo...
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| Format: | Article |
| Language: | English |
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IOP Publishing
2025-01-01
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| Series: | The Astrophysical Journal |
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| Online Access: | https://doi.org/10.3847/1538-4357/adadf2 |
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| author | Hong-Bo Li Lijing Shao Cheng-Jun Xia Ren-Xin Xu |
| author_facet | Hong-Bo Li Lijing Shao Cheng-Jun Xia Ren-Xin Xu |
| author_sort | Hong-Bo Li |
| collection | DOAJ |
| description | As density increases, the shape of nuclei transitions to nonspherical “nuclear pasta” structures. The physical properties of the nuclear pasta, such as thermal conductivity and elasticity, have implications for detecting continuous gravitational waves from a rapidly rotating neutron star. In this work, we investigate the effect of the nuclear pasta on the quadruple moment, and find out that, compared with previous work, the quadrupole moment contributing to continuous gravitational-wave radiation can be up to 2 orders of magnitude larger. We also discuss the relationship between the quadruple moment and the maximum shear strain. Considering the properties of nuclear pasta, we study the detectability of known accreting neutron stars and compare predicted results to the detectable amplitude limits. These sources are well above the sensitivity curves for Cosmic Explorer and Einstein Telescope detectors. Our work advances the understanding of the properties of nuclear pasta and a possible mechanism for continuous gravitational waves. |
| format | Article |
| id | doaj-art-d211dd1a111a461095fbb3b43837cdc1 |
| institution | Kabale University |
| issn | 1538-4357 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | The Astrophysical Journal |
| spelling | doaj-art-d211dd1a111a461095fbb3b43837cdc12025-02-10T08:12:50ZengIOP PublishingThe Astrophysical Journal1538-43572025-01-01980114410.3847/1538-4357/adadf2Continuous Gravitational Waves from Thermal Mountains on Accreting Neutron Stars: Effect of the Nuclear Pasta PhaseHong-Bo Li0https://orcid.org/0000-0002-4850-8351Lijing Shao1https://orcid.org/0000-0002-1334-8853Cheng-Jun Xia2https://orcid.org/0000-0002-3388-1137Ren-Xin Xu3https://orcid.org/0000-0002-9042-3044Kavli Institute for Astronomy and Astrophysics, Peking University , Beijing 100871, People’s Republic of ChinaKavli Institute for Astronomy and Astrophysics, Peking University , Beijing 100871, People’s Republic of China; National Astronomical Observatories, Chinese Academy of Sciences , Beijing 100012, People’s Republic of ChinaCenter for Gravitation and Cosmology, College of Physical Scienceand Technology, Yangzhou University , Yangzhou 225009, People’s Republic of ChinaKavli Institute for Astronomy and Astrophysics, Peking University , Beijing 100871, People’s Republic of China; Department of Astronomy, School of Physics, Peking University , Beijing 100871, People’s Republic of ChinaAs density increases, the shape of nuclei transitions to nonspherical “nuclear pasta” structures. The physical properties of the nuclear pasta, such as thermal conductivity and elasticity, have implications for detecting continuous gravitational waves from a rapidly rotating neutron star. In this work, we investigate the effect of the nuclear pasta on the quadruple moment, and find out that, compared with previous work, the quadrupole moment contributing to continuous gravitational-wave radiation can be up to 2 orders of magnitude larger. We also discuss the relationship between the quadruple moment and the maximum shear strain. Considering the properties of nuclear pasta, we study the detectability of known accreting neutron stars and compare predicted results to the detectable amplitude limits. These sources are well above the sensitivity curves for Cosmic Explorer and Einstein Telescope detectors. Our work advances the understanding of the properties of nuclear pasta and a possible mechanism for continuous gravitational waves.https://doi.org/10.3847/1538-4357/adadf2Neutron starsLow-mass x-ray binary starsGravitational waves |
| spellingShingle | Hong-Bo Li Lijing Shao Cheng-Jun Xia Ren-Xin Xu Continuous Gravitational Waves from Thermal Mountains on Accreting Neutron Stars: Effect of the Nuclear Pasta Phase The Astrophysical Journal Neutron stars Low-mass x-ray binary stars Gravitational waves |
| title | Continuous Gravitational Waves from Thermal Mountains on Accreting Neutron Stars: Effect of the Nuclear Pasta Phase |
| title_full | Continuous Gravitational Waves from Thermal Mountains on Accreting Neutron Stars: Effect of the Nuclear Pasta Phase |
| title_fullStr | Continuous Gravitational Waves from Thermal Mountains on Accreting Neutron Stars: Effect of the Nuclear Pasta Phase |
| title_full_unstemmed | Continuous Gravitational Waves from Thermal Mountains on Accreting Neutron Stars: Effect of the Nuclear Pasta Phase |
| title_short | Continuous Gravitational Waves from Thermal Mountains on Accreting Neutron Stars: Effect of the Nuclear Pasta Phase |
| title_sort | continuous gravitational waves from thermal mountains on accreting neutron stars effect of the nuclear pasta phase |
| topic | Neutron stars Low-mass x-ray binary stars Gravitational waves |
| url | https://doi.org/10.3847/1538-4357/adadf2 |
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