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Timing and emission variation of PSR J1733−3716
Astrophysics and Space Science ( IF 1.9 ) Pub Date : 2020-08-01 , DOI: 10.1007/s10509-020-03849-8
Yue Hu , Lin Li , J. P. Yuan , S. J. Dang , S. Q. Wang , Z. J. Wang , R. Yuen

We present analysis of the timing noise in PSR J1733-3716, which combines data from Parkes 64-m radio telescope and nearly 15 years of timing data obtained from the Nanshan 25-m radio telescope. The variations in the spin frequency and frequency derivative are determined. The fluctuation in the spin frequency is obvious with an amplitude of 1.94(7)*10 -9 Hz. Variations of the integrated profile at 1369 MHz are detected with the changes occur in the relative peak intensity from the right profile component. From analysis of the single pulse data at 1382 MHz, we detect weak emission states that account for 63% of the whole data, and its duration distribution can be fitted with a power law. The pulsar also exhibits strong emission states, during which the emission shows multiple modes. This includes the normal mode, left mode and the right mode, with the time scales spanning between one and seventeen pulse periods. Such short term variability in pulses contributes to the variation of the integrated profile. Examination of the correlations between the spin parameters and the integrated profiles shows likelihood of a random distribution, which reveals that there is probably no obvious relationship between spin-down rate variations and changes of emission in this pulsar.

中文翻译:

PSR J1733−3716 的时间和排放变化

我们对 PSR J1733-3716 中的计时噪声进行了分析,该分析结合了帕克斯 64 米射电望远镜的数据和从南山 25 米射电望远镜获得的近 15 年的计时数据。确定自旋频率和频率导数的变化。自旋频率波动明显,幅度为1.94(7)*10 -9 Hz。检测到 1369 MHz 下积分曲线的变化,随着来自右侧曲线分量的相对峰强度发生变化。通过对1382 MHz单脉冲数据的分析,我们检测到占整个数据63%的弱发射态,其持续时间分布可以拟合幂律。脉冲星还表现出强发射态,在此期间发射显示出多种模式。这包括正常模式、左模式和右模式,时间跨度在 1 到 17 个脉冲周期之间。脉冲的这种短期变化会导致积分分布的变化。对自旋参数和积分剖面之间的相关性的检查显示了随机分布的可能性,这表明这颗脉冲星的自旋下降速率变化与发射变化之间可能没有明显的关系。
更新日期:2020-08-01
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