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| Format: | Preprint |
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2024
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| Online-Zugang: | https://arxiv.org/abs/2408.09204 |
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| _version_ | 1866929623570317312 |
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| author | Zhou, S. Q. Ye, W. T. Ge, M. Y. GügercinoğLu, E. Zheng, S. J. Yu, C. Yuan, J. P. Zhang, J. |
| author_facet | Zhou, S. Q. Ye, W. T. Ge, M. Y. GügercinoğLu, E. Zheng, S. J. Yu, C. Yuan, J. P. Zhang, J. |
| contents | Through a detailed timing analysis of $\textit{Fermi}$-LAT data, the rotational behavior of the $γ$-ray pulsar PSR J1522$-$5735 was tracked from August 2008 (MJD 54692) to January 2024 (MJD 60320). During this 15.4-year period, two over-recovery glitches and four anti-glitches were identified, marking a rare occurrence in rotation-powered pulsars (RPPs). The magnitudes of these (net) spin-down glitches were determined to be $|Δν_{\rm g}/ν| \sim 10^{-8}$, well above the estimated detectability limit. For the two over-recovery glitches, the respective recovery fractions $Q$ are $2.1(7)$ and $1.4(2)$. Further analysis showed no substantial variations in either the flux or pulse profile shape in any of these events, suggesting that small (net) spin-down glitches, unlike large events observed in magnetars and magnetar-like RPPs, may occur without leaving an impact on the magnetosphere. Within the framework of the vortex creep and vortex bending models, anti-glitches and over-recoveries indicate the recoupling of vortex lines that moved inward as a result of a crustquake; meanwhile, the apparent fluctuations in the spin-down rate after the glitches occur as a result of the coupling of the oscillations of bent vortex lines to the magnetosphere. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2408_09204 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | A Series of (Net) Spin-down Glitches in PSR J1522-5735: Insights from the Vortex Creep and Vortex Bending Models Zhou, S. Q. Ye, W. T. Ge, M. Y. GügercinoğLu, E. Zheng, S. J. Yu, C. Yuan, J. P. Zhang, J. High Energy Astrophysical Phenomena Through a detailed timing analysis of $\textit{Fermi}$-LAT data, the rotational behavior of the $γ$-ray pulsar PSR J1522$-$5735 was tracked from August 2008 (MJD 54692) to January 2024 (MJD 60320). During this 15.4-year period, two over-recovery glitches and four anti-glitches were identified, marking a rare occurrence in rotation-powered pulsars (RPPs). The magnitudes of these (net) spin-down glitches were determined to be $|Δν_{\rm g}/ν| \sim 10^{-8}$, well above the estimated detectability limit. For the two over-recovery glitches, the respective recovery fractions $Q$ are $2.1(7)$ and $1.4(2)$. Further analysis showed no substantial variations in either the flux or pulse profile shape in any of these events, suggesting that small (net) spin-down glitches, unlike large events observed in magnetars and magnetar-like RPPs, may occur without leaving an impact on the magnetosphere. Within the framework of the vortex creep and vortex bending models, anti-glitches and over-recoveries indicate the recoupling of vortex lines that moved inward as a result of a crustquake; meanwhile, the apparent fluctuations in the spin-down rate after the glitches occur as a result of the coupling of the oscillations of bent vortex lines to the magnetosphere. |
| title | A Series of (Net) Spin-down Glitches in PSR J1522-5735: Insights from the Vortex Creep and Vortex Bending Models |
| topic | High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2408.09204 |