Searching for continuous gravitational waves in the Parkes Pulsar Timing Array Data Release 3
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| Main Authors: | , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2025
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| author | Zhao, Shi-Yi Chen, Zu-Cheng Tremblay, Jacob Cardinal Goncharov, Boris Zhu, Xing-Jiang Bhat, N. D. Ramesh Curyło, Małgorzata Dai, Shi Di Marco, Valentina Ding, Hao Hobbs, George Kapur, Agastya Ling, Wenhua Liu, Tao Mandow, Rami Mishra, Saurav Reardon, Daniel J. Russell, Christopher J Shannon, Ryan M. Wang, Shuangqiang Zhang, Lei Zic, Andrew |
| author_facet | Zhao, Shi-Yi Chen, Zu-Cheng Tremblay, Jacob Cardinal Goncharov, Boris Zhu, Xing-Jiang Bhat, N. D. Ramesh Curyło, Małgorzata Dai, Shi Di Marco, Valentina Ding, Hao Hobbs, George Kapur, Agastya Ling, Wenhua Liu, Tao Mandow, Rami Mishra, Saurav Reardon, Daniel J. Russell, Christopher J Shannon, Ryan M. Wang, Shuangqiang Zhang, Lei Zic, Andrew |
| contents | We present results from an all-sky search for continuous gravitational waves from individual supermassive binary black holes using the third data release (DR3) of the Parkes Pulsar Timing Array (PPTA). Even though we recover a common-spectrum stochastic process, potentially induced by a nanohertz gravitational wave background, we find no evidence of continuous waves. Therefore, we place upper limits on the gravitational-wave strain amplitude: in the most sensitive frequency range around 10 nHz, we obtain a sky-averaged 95\% credibility upper limit of $\approx 7 \times 10^{-15}$. Our search is sensitive to supermassive binary black holes with a chirp mass of $\geq 10^9M_{\odot}$ up to a luminosity distance of 50 Mpc for our least sensitive sky direction and 200 Mpc for the most sensitive direction. This work provides at least 4 times better sensitivity in the 1-200 nHz frequency band than our last search based on the PPTA's first data release. We expect that PPTA will continue to play a key role in detecting continuous gravitational waves in the exciting era of nanohertz gravitational wave astronomy. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2508_13944 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Searching for continuous gravitational waves in the Parkes Pulsar Timing Array Data Release 3 Zhao, Shi-Yi Chen, Zu-Cheng Tremblay, Jacob Cardinal Goncharov, Boris Zhu, Xing-Jiang Bhat, N. D. Ramesh Curyło, Małgorzata Dai, Shi Di Marco, Valentina Ding, Hao Hobbs, George Kapur, Agastya Ling, Wenhua Liu, Tao Mandow, Rami Mishra, Saurav Reardon, Daniel J. Russell, Christopher J Shannon, Ryan M. Wang, Shuangqiang Zhang, Lei Zic, Andrew General Relativity and Quantum Cosmology Cosmology and Nongalactic Astrophysics High Energy Astrophysical Phenomena We present results from an all-sky search for continuous gravitational waves from individual supermassive binary black holes using the third data release (DR3) of the Parkes Pulsar Timing Array (PPTA). Even though we recover a common-spectrum stochastic process, potentially induced by a nanohertz gravitational wave background, we find no evidence of continuous waves. Therefore, we place upper limits on the gravitational-wave strain amplitude: in the most sensitive frequency range around 10 nHz, we obtain a sky-averaged 95\% credibility upper limit of $\approx 7 \times 10^{-15}$. Our search is sensitive to supermassive binary black holes with a chirp mass of $\geq 10^9M_{\odot}$ up to a luminosity distance of 50 Mpc for our least sensitive sky direction and 200 Mpc for the most sensitive direction. This work provides at least 4 times better sensitivity in the 1-200 nHz frequency band than our last search based on the PPTA's first data release. We expect that PPTA will continue to play a key role in detecting continuous gravitational waves in the exciting era of nanohertz gravitational wave astronomy. |
| title | Searching for continuous gravitational waves in the Parkes Pulsar Timing Array Data Release 3 |
| topic | General Relativity and Quantum Cosmology Cosmology and Nongalactic Astrophysics High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2508.13944 |