تقرير
Pulse Jitter and Single-pulse Variability in Millisecond Pulsars
| العنوان: | Pulse Jitter and Single-pulse Variability in Millisecond Pulsars |
|---|---|
| المؤلفون: | 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. |
| سنة النشر: | 2024 |
| المجموعة: | Astrophysics |
| مصطلحات موضوعية: | Astrophysics - High Energy Astrophysical Phenomena |
| الوصف: | 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. Comment: 14 pages, 9 figures, Accepted for publication in ApJ |
| نوع الوثيقة: | Working Paper |
| الوصول الحر: | http://arxiv.org/abs/2401.12426Test |
| رقم الانضمام: | edsarx.2401.12426 |
| قاعدة البيانات: | arXiv |
| الوصف غير متاح. |