There are currently two well-accepted models that explain how pulsars exhibit glitches, sudden changes in their regular rotational spin-down. According to the starquake model, the glitch healing parameter Q, which is measurable in some cases from pulsar timing, should be equal to the ratio of the moment of inertia of the superfluid core of a neutron star (NS) to its total moment of inertia. Measured values of the healing parameter from pulsar glitches can therefore be used in combination with realistic NS structure models as one test of the feasibility of the starquake model as a glitch mechanism. We have constructed NS models using seven representative equations of state of superdense matter to test whether starquakes can account for glitches observed in the Crab and Vela pulsars, for which the most extensive and accurate glitch data are available. We also present a compilation of all measured values of Q for Crab and Vela glitches to date that have been separately published in the literature. We have computed the fractional core moment of inertia for stellar models covering a range of NS masses and find that for stable NSs in the realistic mass range 1.4 ± 0.2 M☉, the fraction is greater than 0.55 in all cases. This range is not consistent with the observational restriction Q 0.2 for Vela if starquakes are the cause of its glitches. This confirms results of previous studies of the Vela pulsar that have suggested that starquakes are not a feasible mechanism for Vela glitches. The much larger values of Q observed for Crab glitches (Q 0.7) are consistent with starquake model predictions and support previous conclusions that starquakes can be the cause of Crab glitches.
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机译：当前有两个公认的模型可以解释脉冲星如何表现出毛刺，规则旋转旋转的突然变化。根据星震模型，在某些情况下可以从脉冲星定时测量的毛刺修复参数Q应当等于中子星（NS）超流体核的惯性矩与其总惯性矩之比。 。因此，可以将脉冲星故障产生的愈合参数的测量值与实际的NS结构模型结合使用，作为对星震模型作为故障机制的可行性的一种测试。我们使用七个具有代表性的超密物质状态方程构建了NS模型，以测试地震是否可以解释在Crab和Vela脉冲星中观测到的毛刺，对于这些毛刺，可以得到最广泛，最准确的毛刺数据。我们还提供了迄今为止针对螃蟹和贝拉毛刺的所有Q测量值的汇编，这些文献已分别发表在文献中。我们已经计算出了覆盖了一系列NS质量的恒星模型的核心惯性矩分数，发现对于现实质量范围为1.4±0.2 M for的稳定NS，在所有情况下该分数均大于0.55。如果地震是毛刺引起的，则该范围与Vela的观测限制Q 0.2不一致。这证实了先前对Vela脉冲星的研究结果，该研究表明，地震不是Vela毛刺的可行机制。观测到的螃蟹毛刺的Q值大得多（Q 0.7）与地震模型的预测一致，并支持先前的结论，即地震可能是螃蟹毛刺的原因。
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