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首页> 外文期刊>The Astrophysical journal >A MICROGLITCH IN THE MILLISECOND PULSAR PSR B1821-24 IN M28
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A MICROGLITCH IN THE MILLISECOND PULSAR PSR B1821-24 IN M28

机译：M28中微距脉冲PSR B1821-24中的微故障

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摘要

We report on the observation of a very small glitch observed for the first time in a millisecond pulsar, PSR B1821-24, located in the globular cluster M28. Timing observations were mainly conducted with the Nancay radio telescope (France), and confirmation comes from the 140 ft radio telescope at Green Bank and the new Green Bank Telescope data. This event is characterized by a rotation frequency step of 3 nHz, or 10~(-11) in fractional frequency change, along with a short duration limited to a few days or a week. A marginally significant frequency derivative step was also found. This glitch follows the main characteristics of those in the slow-period pulsars but is 2 orders of magnitude smaller than the smallest ever recorded. Such an event must be very rare for millisecond pulsars since no other glitches have been detected when the cumulated number of years of millisecond pulsar timing observations up to 2001 is around 500 for all these objects. However, pulsar PSR B1821-24 is one of the youngest among the old recycled ones, and there is likely a correlation between age, or a related parameter, and timing noise. While this event happens on a much smaller scale, the required adjustment of the star to a new equilibrium figure as it spins down is a likely common cause for all glitches.
机译：我们报告了在毫秒脉冲星PSR B1821-24（位于球状星团M28中）中首次观察到的非常小的毛刺的观察结果。定时观测主要是用法国的Nancay射电望远镜进行的，确认来自Green Bank的140英尺射电望远镜和新的Green Bank望远镜数据。此事件的特征是旋转频率步进为3 nHz，即分数频率变化为10〜（-11），并且持续时间限制为几天或一周。还发现了边际有效的频率导数阶跃。该故障遵循慢周期脉冲星的主要特征，但比有记录的最小脉冲星小2个数量级。对于毫秒脉冲星来说，这样的事件一定是非常罕见的，因为当所有这些天体直到2001年的毫秒脉冲星定时观测的累积年数大约为500时，都没有检测到其他故障。但是，脉冲星PSR B1821-24是旧的回收脉冲星中最年轻的脉冲星之一，年龄或相关参数与定时噪声之间可能存在相关性。尽管此事件发生的规模要小得多，但由于恒星旋转而需要将其调整至新的平衡值，这可能是所有故障的常见原因。

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