Constraints on the velocity of gravitational waves from NANOGrav 15-year data set
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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_ | 1866909554236719104 |
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| author | Bi, Yan-Chen Wu, Yu-Mei Chen, Zu-Cheng Huang, Qing-Guo |
| author_facet | Bi, Yan-Chen Wu, Yu-Mei Chen, Zu-Cheng Huang, Qing-Guo |
| contents | General relativity predicts that gravitational waves propagate at the speed of light. Although ground-based gravitational-wave detectors have successfully constrained the velocity of gravitational waves in the high-frequency range, extending this constraint to the lower frequency range remains a challenge. In this work, we utilize the deviations in the overlap reduction function for a gravitational-wave background within pulsar timing arrays to investigate the velocity of gravitational waves in the nanohertz frequency band. By analyzing the NANOGrav 15-year data set, we obtain a well-constrained lower bound for the velocity of gravitational waves that $v \gtrsim 0.87\,c$, where $c$ is the speed of light. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2310_08366 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Constraints on the velocity of gravitational waves from NANOGrav 15-year data set Bi, Yan-Chen Wu, Yu-Mei Chen, Zu-Cheng Huang, Qing-Guo Cosmology and Nongalactic Astrophysics General Relativity and Quantum Cosmology General relativity predicts that gravitational waves propagate at the speed of light. Although ground-based gravitational-wave detectors have successfully constrained the velocity of gravitational waves in the high-frequency range, extending this constraint to the lower frequency range remains a challenge. In this work, we utilize the deviations in the overlap reduction function for a gravitational-wave background within pulsar timing arrays to investigate the velocity of gravitational waves in the nanohertz frequency band. By analyzing the NANOGrav 15-year data set, we obtain a well-constrained lower bound for the velocity of gravitational waves that $v \gtrsim 0.87\,c$, where $c$ is the speed of light. |
| title | Constraints on the velocity of gravitational waves from NANOGrav 15-year data set |
| topic | Cosmology and Nongalactic Astrophysics General Relativity and Quantum Cosmology |
| url | https://arxiv.org/abs/2310.08366 |