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arXiv 1608.01901astro-ph.HE
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LMC脉冲星B0540-69的一个新的低制动指数

A New, Low Braking Index For the LMC Pulsar B0540-69

F. E. Marshall, L. Guillemot, A. K. Harding, P. Martin, D. A. Smith

摘要:

我们报告的结果,为期16个月的监测活动使用雨燕卫星PSR B 0540 -69,一个年轻的脉冲星在大麦云云。在整个活动期间保持相位连接,以便能够确定可靠的星历,活动的长度足以准确确定自旋频率及其一阶和二阶导数。制动指数为0.031 +/- 0.013(90%置信度),远低于先前报道的B 0540 -69和几乎所有其他年轻的A500。我们使用来自RXTE的广泛监测活动的数据表明,定时噪声不太可能显著影响测量。这是首次测量脉冲星最近发现的高自旋下降状态的制动指数。我们讨论了产生低制动指数的可能机制。

英文摘要:

We report the results of a 16-month monitoring campaign using the Swift satellite of PSR B0540-69, a young pulsar in the Large Magellanic Cloud. Phase connection was maintained throughout the campaign so that a reliable ephemeris could be determined, and the length of the campaign is adequate to accurately determine the spin frequency and its first and second derivatives. The braking index is 0.031 +/- 0.013 (90% confidence), a value much lower than previously reported for B0540-69 and almost all other young pulsars. We use data from the extensive monitoring campaign with RXTE to show that timing noise is unlikely to significantly affect the measurement. This is the first measurement of the braking index in the pulsar's recently discovered high spin-down state. We discuss possible mechanisms for producing the low braking index.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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