TimeTubes: Visualization of polarization variations in blazars
TimeTubes: Visualization of polarization variations in blazars
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DOI：
10.3390/galaxies4030023
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发表时间：
2016-09
期刊：
影响因子：
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通讯作者：
M. Uemura;R. Itoh;Longyin Xu;Masanori Nakayama;Hsiang-Yun Wu;Kazuho Watanabe;Shigeo Takahashi;I. Fujishiro
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文献类型：
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作者：
M. Uemura;R. Itoh;Longyin Xu;Masanori Nakayama;Hsiang-Yun Wu;Kazuho Watanabe;Shigeo Takahashi;I. Fujishiro
光学偏振为研究耀变体喷流中的磁场提供了重要线索。在偏振度（PD）和位置角（PA）的时间序列数据中很容易发现值得注意的模式。另一方面，当物体具有多个偏振分量时，我们需要看到物体在Stokes Q U平面中的轨迹。在这种情况下，具有讽刺意味的是，我们拥有的数据越多，就越难从中获得任何知识。在这里，我们介绍TimeTubes，一种新的可视化方案，以探索在blazars中观察到的偏振时间序列数据。在TimeTubes中，数据由三维（Q、U和时间）空间中的管表示。物体的Q和U、颜色和总通量的测量误差表示为管的尺寸、颜色和亮度。因此，TimeTubes允许我们在一个视图中看到六个变量的行为。我们使用TimeTubes来获取金田望远镜在2008年至2014年期间拍摄的数据。我们发现，这个工具有利于识别的模式耀变体，例如，有利的PA耀斑和PA旋转与一系列耀斑。
Optical polarization provides important clues to the magnetic field in blazar jets. It is easy to find noteworthy patterns in the time-series data of the polarization degree (PD) and position angle (PA). On the other hand, we need to see the trajectory of the object in the Stokes Q U plane when the object has multiple polarized components. In this case, ironically, the more data we have, the more difficult it is to gain any knowledge from it. Here, we introduce TimeTubes, a new visualization scheme to explore the time-series data of polarization observed in blazars. In TimeTubes, the data is represented by tubes in 3D (Q, U, and time) space. The measurement errors of Q and U, color, and total flux of objects are expressed as the size, color, and brightness of the tubes. As a result, TimeTubes allows us to see the behavior of six variables in one view. We used TimeTubes for our data taken by the Kanata telescope between 2008 and 2014. We found that this tool facilitates the recognition of the patterns in blazar variations; for example, favored PA of flares and PA rotations associated with a series of flares.