Chinese Pulsar Timing Array upper limits on microhertz gravitational waves from supermassive black-hole binaries using PSR J1713+0747 FAST data
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arXiv
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| Autori principali: | , , , , , , , , |
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| Natura: | Preprint |
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2025
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| author | Caballero, R. Nicolas Xu, Heng Lee, Kejia Chen, Siyuan Guo, Yanjun Jiang, Jinchen Wan, Bojun Xu, Jiangwei Xue, Zihan |
| author_facet | Caballero, R. Nicolas Xu, Heng Lee, Kejia Chen, Siyuan Guo, Yanjun Jiang, Jinchen Wan, Bojun Xu, Jiangwei Xue, Zihan |
| contents | We derive the gravitational-wave (GW) strain upper limits from resolvable supermassive black-hole binaries using the data from the Five-hundred-meter Aperture Spherical radio Telescope (FAST), in the context of the Chinese Pulsar Timing Array project. We focus on circular orbits in the $μ$Hz GW frequency band between $10^{-7}$ and $3\times10^{-6}$ Hz. This frequency band is higher than the traditional pulsar timing array band and is less explored. We used the data of the millisecond pulsar PSR J1713+5307 observed between August 2019 and April 2021. A dense observation campaign was carried out in September 2020 to allow for the $μ$Hz band coverage. Our sky-average continuous source upper limit at the 95% confidence level at 1$μ$Hz is 1.26$\times10^{-12}$, while the same limit in the direction of the pulsar is 4.77$\times10^{-13}$. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2502_09275 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Chinese Pulsar Timing Array upper limits on microhertz gravitational waves from supermassive black-hole binaries using PSR J1713+0747 FAST data Caballero, R. Nicolas Xu, Heng Lee, Kejia Chen, Siyuan Guo, Yanjun Jiang, Jinchen Wan, Bojun Xu, Jiangwei Xue, Zihan High Energy Astrophysical Phenomena Cosmology and Nongalactic Astrophysics We derive the gravitational-wave (GW) strain upper limits from resolvable supermassive black-hole binaries using the data from the Five-hundred-meter Aperture Spherical radio Telescope (FAST), in the context of the Chinese Pulsar Timing Array project. We focus on circular orbits in the $μ$Hz GW frequency band between $10^{-7}$ and $3\times10^{-6}$ Hz. This frequency band is higher than the traditional pulsar timing array band and is less explored. We used the data of the millisecond pulsar PSR J1713+5307 observed between August 2019 and April 2021. A dense observation campaign was carried out in September 2020 to allow for the $μ$Hz band coverage. Our sky-average continuous source upper limit at the 95% confidence level at 1$μ$Hz is 1.26$\times10^{-12}$, while the same limit in the direction of the pulsar is 4.77$\times10^{-13}$. |
| title | Chinese Pulsar Timing Array upper limits on microhertz gravitational waves from supermassive black-hole binaries using PSR J1713+0747 FAST data |
| topic | High Energy Astrophysical Phenomena Cosmology and Nongalactic Astrophysics |
| url | https://arxiv.org/abs/2502.09275 |