Gravitational Waves Generated by Null Cosmic Strings
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arXiv
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| Hauptverfasser: | , , , |
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| Format: | Preprint |
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2023
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| _version_ | 1866910404188307456 |
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| author | Fursaev, D. V. Davydov, E. A. Pirozhenko, I. G. Tainov, V. A. |
| author_facet | Fursaev, D. V. Davydov, E. A. Pirozhenko, I. G. Tainov, V. A. |
| contents | Null cosmic strings are shown to disturb gravitational fields of massive bodies and create outgoing gravitational waves (GW). Perturbations of the metric caused by a straight null string and a point-like massive source are found as solutions to linearized Einstein equations on a flat space-time. An analytic approximation for their asymptotic at future null infinity is derived. A space-time created by the source and the string is shown to have asymptotically polyhomogeneous form. We calculate GW flux in such space-times and demonstrate that the averaged intensity of the radiation is maximal in the direction of the string motion. Opportunities to detect null string generated gravity waves are briefly discussed. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2311_01863 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Gravitational Waves Generated by Null Cosmic Strings Fursaev, D. V. Davydov, E. A. Pirozhenko, I. G. Tainov, V. A. General Relativity and Quantum Cosmology High Energy Physics - Theory Null cosmic strings are shown to disturb gravitational fields of massive bodies and create outgoing gravitational waves (GW). Perturbations of the metric caused by a straight null string and a point-like massive source are found as solutions to linearized Einstein equations on a flat space-time. An analytic approximation for their asymptotic at future null infinity is derived. A space-time created by the source and the string is shown to have asymptotically polyhomogeneous form. We calculate GW flux in such space-times and demonstrate that the averaged intensity of the radiation is maximal in the direction of the string motion. Opportunities to detect null string generated gravity waves are briefly discussed. |
| title | Gravitational Waves Generated by Null Cosmic Strings |
| topic | General Relativity and Quantum Cosmology High Energy Physics - Theory |
| url | https://arxiv.org/abs/2311.01863 |