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arXiv 2012.10156astro-ph.HE
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用FAST观测PSR B1929 +10中的周期和锁相调制

Periodic and Phase-locked Modulation in PSR B1929+10 Observed with FAST

F. F. Kou, W. M. Yan, B. Peng, J. G. Lu, K. Liu, C. M. Zhang, R. G. Strom, L. Wang, J. P. Yuan, Rai Yuen, Y. Z. Yu, J. M. Yao, B. Liu, J. Yan, P. Jiang, C. J. J… 展开作者

F. F. Kou, W. M. Yan, B. Peng, J. G. Lu, K. Liu, C. M. Zhang, R. G. Strom, L. Wang, J. P. Yuan, Rai Yuen, Y. Z. Yu, J. M. Yao, B. Liu, J. Yan, P. Jiang, C. J. Jin, D. Li, L. Qian, Y. L. Yue, Y. Zhu

摘要:

我们提出了一个详细的单脉冲分析PSR B1929+10的基础上与500米口径球面射电望远镜(FAST)的观测。主脉冲和脉冲间被调制的周期为$\sim12$乘以脉冲星的旋转周期($P$)。$\sim12P$调制被确认为周期性幅度调制,而不是系统漂移。发现IP中的周期幅度调制与MP的弱先行分量(MP_I)中的周期幅度调制反相关,而与MP的前两个分量(MP_II)中的周期幅度调制相关,这意味着IP和MP中的调制模式是锁相的。更有趣的是,MP_II中的调制比IP中的调制延迟约1P。此外,FAST的高灵敏度观测表明,MP和IP之间存在弱发射。此外,我们确认IP和MP之间的间隔与射频无关。上述结果是脉冲星理论的一个难题,目前的脉冲星模型不能满意地解释。因此,我们的观测结果与FAST提供了一个机会,探测脉冲星发射的结构和中子星的磁层。

英文摘要:

We present a detailed single-pulse analysis for PSR B1929+10 based on observations with the Five-hundred-meter Aperture Spherical radio Telescope (FAST). The main pulse and interpulse are found to be modulated with a periodicity of $\sim12$ times the pulsar's rotational period ($P$). The $\sim12P$ modulation is confirmed as a periodic amplitude modulation instead of systematic drifting. The periodic amplitude modulation in the IP is found to be anti-correlated with that in the weak preceding component of the MP (MP_I), but correlated with that in the first two components of the MP (MP_II), which implies that the modulation patterns in the IP and the MP are phase-locked. What is more interesting is that the modulation in MP_II is delayed that in the IP by about 1P. Furthermore, high sensitivity observations by FAST reveal that weak emission exists between the MP and the IP. In addition, we confirm that the separation between the IP and the MP is independent of radio frequency. The above results are a conundrum for pulsar theories and cannot be satisfactorily explained by the current pulsar models. Therefore, our results observed with FAST provide an opportunity to probe the structure of pulsar emission and the neutron star's magnetosphere.

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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