期刊
ASTROPHYSICAL JOURNAL
卷 863, 期 2, 页码 -出版社
IOP Publishing Ltd
DOI: 10.3847/1538-4357/aad228
关键词
dense matter; pulsars: general; stars: interiors; stars: neutron; stars: rotation
资金
- Australian Research Council Centre of Excellence for Gravitational Wave Discovery (OzGrav) [CE170100004]
- Australian Postgraduate Award
- National Science Foundation [PHY-1607611]
Few statistically compelling correlations are found in pulsar timing data between the size of a rotational glitch and the time to the preceding glitch (backward waiting time) or the succeeding glitch (forward waiting time), except for a strong correlation between sizes and forward waiting times in PSR J0537-6910. This situation is counterintuitive if glitches are threshold-triggered events, as in standard theories (e.g., starquakes, superfluid vortex avalanches). Here, it is shown that the lack of correlation emerges naturally, when a threshold trigger is combined with secular stellar braking slower than a critical, calculable rate. The Pearson and Spearman correlation coefficients are computed and interpreted within the framework of a state-dependent Poisson process. Specific, falsifiable predictions are made regarding what objects currently targeted by long-term timing campaigns should develop strong size-waiting-time correlations as more data are collected in the future.
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