发表机构
Hiroshima University; Huazhong University of Science and Technology（广岛大学; 华中科技大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本文研究外间隙模型中含向内辐射的脉冲星同步辐射偏振，发现强度峰值处偏振角变化且常伴高偏振度，重叠时变化超50度，并与IXPE观测对比确定PSR B1509-58的视线方向。
AI 中文摘要
随着2021年成像X射线偏振探测器的发射，最近的观测为几颗旋转供能脉冲星提供了X射线偏振数据。为了充分利用这些数据，更好地理解偏振特性与磁层结构之间的关系至关重要。在本文中，我们研究了外间隙模型中的偏振特性，同时考虑了向外辐射和朝向旋转轴的向内辐射，这是先前未曾考虑过的。我们发现，偏振位置角在强度峰值处发生变化，通常伴随着高偏振度，这与向外辐射的情况一致。此外，当向外和向内辐射的强度峰值重叠时，偏振位置角的变化往往超过50度，而相比之下，仅存在向外辐射的情况则不然。我们将包含向内辐射的偏振模型与IXPE观测进行了比较。例如，对于PSR B1509-58，在外间隙模型中提出向内辐射占主导地位，我们发现观测到的偏振位置角摆动更倾向于来自南半球的视线，而非北半球。
英文摘要
With the launch of the Imaging X-ray Polarimeter Explorer in 2021, recent observations have provided X-ray polarization data for several rotation-powered pulsars. To fully exploit these data, it is important to better understand the relationship between polarization properties and the magnetospheric structure. In this paper, we investigate polarization properties in the outer gap model, incorporating both outward emission and inward emission toward the rotation axis, which has not been considered previously. We find that the polarization position angle varies at the intensity peaks, typically accompanied by a high polarization degree, as is in the case for outward emission. Moreover, the variation in the polarization position angle tends to exceed 50 degrees when the intensity peaks of outward and inward emissions overlap, compared to cases with only outward emission. We compare the polarization model including inward emission with IXPE observations. For example, for PSR B1509-58 where inward emission is proposed to be dominant in the outer gap model, we find that observed PA swing prefers a line of sight from the southern hemisphere rather than the northern hemisphere.
Comments15 pages, 10 figures, 1 table. Accepted for publication in ApJ
