Pulse Jitter and Single-pulse Variability in Millisecond Pulsars
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arXiv
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| Format: | Preprint |
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2024
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| _version_ | 1866929219695542272 |
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| author | Wang, S. Q. Wang, N. Wang, J. B. Hobbs, G. Xu, H. Wang, B. J. Dai, S. Dang, S. J. Li, D. Feng, Y. Zhang, C. M. |
| author_facet | Wang, S. Q. Wang, N. Wang, J. B. Hobbs, G. Xu, H. Wang, B. J. Dai, S. Dang, S. J. Li, D. Feng, Y. Zhang, C. M. |
| contents | Understanding the jitter noise resulting from single-pulse phase and shape variations is important for the detection of gravitational waves using pulsar timing array. We presented measurements of jitter noise and single-pulse variability of 12 millisecond pulsars that are part of the International Pulsar Timing Array sample using the Five-hundred-meter Aperture Spherical radio Telescope (FAST). We found that the levels of jitter noise can vary dramatically among pulsars. A moderate correlation with a correlation coefficient of 0.57 between jitter noise and pulse width is detected. To mitigate jitter noise, we performed matrix template matching using all four Stokes parameters. Our results revealed a reduction in jitter noise ranging from 6.7\% to 39.6\%. By performing longitude-resolved fluctuation spectrum analysis, we identified periodic intensity modulations in 10 pulsars. In PSR J0030+0451, we detected single-pulses with energies more than 10 times the average pulse energy, suggesting the presence of giant pulses. We also observed a periodic mode-changing phenomenon in PSR J0030+0451. We examined the achievable timing precision by selecting a sub-set of pulses with a specific range of peak intensity, but no significant improvement in timing precision is achievable. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2401_12426 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Pulse Jitter and Single-pulse Variability in Millisecond Pulsars Wang, S. Q. Wang, N. Wang, J. B. Hobbs, G. Xu, H. Wang, B. J. Dai, S. Dang, S. J. Li, D. Feng, Y. Zhang, C. M. High Energy Astrophysical Phenomena Understanding the jitter noise resulting from single-pulse phase and shape variations is important for the detection of gravitational waves using pulsar timing array. We presented measurements of jitter noise and single-pulse variability of 12 millisecond pulsars that are part of the International Pulsar Timing Array sample using the Five-hundred-meter Aperture Spherical radio Telescope (FAST). We found that the levels of jitter noise can vary dramatically among pulsars. A moderate correlation with a correlation coefficient of 0.57 between jitter noise and pulse width is detected. To mitigate jitter noise, we performed matrix template matching using all four Stokes parameters. Our results revealed a reduction in jitter noise ranging from 6.7\% to 39.6\%. By performing longitude-resolved fluctuation spectrum analysis, we identified periodic intensity modulations in 10 pulsars. In PSR J0030+0451, we detected single-pulses with energies more than 10 times the average pulse energy, suggesting the presence of giant pulses. We also observed a periodic mode-changing phenomenon in PSR J0030+0451. We examined the achievable timing precision by selecting a sub-set of pulses with a specific range of peak intensity, but no significant improvement in timing precision is achievable. |
| title | Pulse Jitter and Single-pulse Variability in Millisecond Pulsars |
| topic | High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2401.12426 |