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We present new analysis of multi-epoch, H-band, scattered light images of theAB Aur system. We used a Monte Carlo, radiative transfer code to simultaneouslymodel the system's SED and H-band polarized intensity imagery. We find that adisk-dominated model, as opposed to one that is envelope dominated, canplausibly reproduce AB Aur's SED and near-IR imagery. This is consistent withprevious modeling attempts presented in the literature and supports the ideathat at least a subset of AB Aur's spirals originate within the disk. In lightof this, we also analyzed the movement of spiral structures in multi-epochH-band total light and polarized intensity imagery of the disk. We detect nosignificant rotation or change in spatial location of the spiral structures inthese data, which span a 5.8 year baseline. If such structures are caused bydisk-planet interactions, the lack of observed rotation constrains the locationof the orbit of planetary perturbers to be >47 AU.

Constraining the Movement of the Spiral Features and the Locations of Planetary Bodies within the AB Aur System