在AB Aur系统中约束螺旋特征的运动和行星体的位置
Constraining the Movement of the Spiral Features and the Locations of Planetary Bodies within the AB Aur System
摘要：
我们提出了新的分析多历元，H波段，散射光图像的AB Aur系统。我们使用蒙特卡罗，辐射转移代码，同时模拟系统的SED和H波段偏振强度图像。我们发现，一个磁盘为主的模型，而不是一个信封为主，可以合理地再现AB Aur的SED和近红外图像。这与文献中提出的先前建模尝试是一致的，并且支持至少AB Aur的螺旋的子集起源于盘内的想法。在此基础上，我们还分析了螺旋结构在多历元H波段总光图像和偏振强度图像中的运动。在这些数据中，我们没有发现螺旋结构的空间位置发生显著旋转或变化，这些数据跨越了5.8年的基线。如果这种结构是由盘-行星相互作用引起的，那么由于没有观测到自转，行星摄动轨道的位置将被限制在>47天文单位。
英文摘要：
We present new analysis of multi-epoch, H-band, scattered light images of the AB Aur system. We used a Monte Carlo, radiative transfer code to simultaneously model the system's SED and H-band polarized intensity imagery. We find that a disk-dominated model, as opposed to one that is envelope dominated, can plausibly reproduce AB Aur's SED and near-IR imagery. This is consistent with previous modeling attempts presented in the literature and supports the idea that at least a subset of AB Aur's spirals originate within the disk. In light of this, we also analyzed the movement of spiral structures in multi-epoch H-band total light and polarized intensity imagery of the disk. We detect no significant rotation or change in spatial location of the spiral structures in these data, which span a 5.8 year baseline. If such structures are caused by disk-planet interactions, the lack of observed rotation constrains the location of the orbit of planetary perturbers to be >47 AU.
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