The topology and polarization of subbeams associated with the drifting subpulse emission of pulsar B0943+10 – VII. Analysis of transitional intervals in the mode-switching process
The topology and polarization of subbeams associated with the drifting subpulse emission of pulsar B0943+10 – VII. Analysis of transitional intervals in the mode-switching process
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与脉冲星 B0943 10 VII 漂移子脉冲发射相关的子光束的拓扑和偏振。
DOI：
10.1093/mnras/stad3025
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发表时间：
2023
影响因子：
4.8
通讯作者：
Suleymanova, S. A.
中科院分区：
文献类型：
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作者：
Logvinenko, S. V.;Rankin, Joanna M.;Suleymanova, S. A.
我们利用阿雷西博327 MHz的观测资料，研究了脉冲星B0943+10‘S两种主要的Q和B发射模式之间的转换间隔。这项研究的目的是检测最近在较低频率发现的327兆赫“过渡”模式的迹象。我们发现在327 MHz处的亚脉冲漂移和轮廓形状图案类似于Q-B模式转变过程中在较低频率处发现的那些图案。在亚脉冲漂移出现之前的大约15周的恒星自转过程中，也观察到了脉冲的衰落。另一部分工作是详细研究了主要模式下的脉冲偏振变化。发现了平均轮廓的主要第一分量的线偏振百分率与B型年龄的复杂关系：在最初的4h内，线偏振百分率从5%持续增加到40% %，在接下来的1.5h内逐渐下降到30% %，直到随后的Q模开始。相比之下，第二个组件的lpp在B模式寿命内不变，保持在22% 的水平。在Q模式开始时，LPP出现非瞬时的下降。平均Q-模脉冲的LPP在几小时内没有发现系统性的变化。在核锥光束模型和正交偏振模式的框架下对结果进行了讨论。
We report a study of the transitional intervals between pulsar B0943+10’s two primary Q and B emission modes using Arecibo 327-MHz observations. The goal of this study was to detect signs of a ‘transitional’ mode at 327 MHz, discovered recently at lower frequencies. We have found subpulse drift and profile form patterns at 327 MHz similar to those identified at lower frequencies in the Q-to-B mode transition process. Pulse fading during about 15 stellar rotations preceding the appearance of subpulse drift was observed as well. Another part of the work is devoted to a detailed study of the pulse polarization variations in the main modes. A complex behaviour of the linear polarization percentage (LPP) of the dominant first component of the average profile with B-mode age has been found: during the first 4 h, the LPP continuously increases from 5 to 40 per cent, and over the next 1.5 h gradually decreases down to 30 per cent until the subsequent onset of the Q mode. In contrast, the LPP of the second component does not change over the B-mode lifetime, remaining at the level of 22 per cent. A non-instantaneous decrease in the LPP was detected at Q-mode onset. No systematic change of the LPP of the averaged Q-mode pulses over several hours of age was found. The results are discussed within the framework of the core–cone beam model and orthogonal polarization modes.