Through a detailed timing analysis of Fermi-LAT data, the rotational behavior of the γ-ray pulsar PSR J1522−5735 was tracked from 2008 August (MJD 54692) to 2024 January (MJD 60320). During this 15.4 yr period, two overrecovery glitches and four antiglitches were identified, marking a rare occurrence in rotation-powered pulsars (RPPs). The magnitudes of these (net) spin-down glitches were determined to be ∣Δνg/ν∣ ∼ 10−8, well above the estimated detectability limit. For the two overrecovery 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, antiglitches and overrecoveries 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.

中文翻译：

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PSR J1522–5735 中的一系列（净）自旋下降毛刺：来自涡旋蠕变和涡旋弯曲模型的见解


通过对费米-LAT 数据的详细时序分析，从 2008 年 8 月 （MJD 54692） 到 2024 年 1 月 （MJD 60320） 跟踪了γ射线脉冲星 PSR J1522−5735 的旋转行为。在这 15.4 年期间，发现了 2 个超恢复毛刺和 4 个抗毛刺，这在旋转动力脉冲星 （RPP） 中很少见。这些（净）自旋下降毛刺的幅度被确定为 ∣Δνg/ν∣ ∼ 10−8，远高于估计的可探测极限。对于两个过恢复毛刺，各自的恢复分数 Q 为 2.1（7） 和 1.4（2）。进一步的分析表明，在这些事件中，磁通量或脉冲剖面形状都没有实质性变化，这表明与在磁星和类磁星 RPP 中观察到的大事件不同，小（净）自旋下降毛刺可能会发生而不会对磁层产生影响。在涡旋蠕变和涡旋弯曲模型的框架内，抗毛刺和过度恢复表明由于地壳地震而向内移动的涡旋线的再耦合;同时，毛刺后自旋下降速率的明显波动是由于弯曲的涡旋线的振荡耦合到磁层的结果。