The high-resolution structure of debris disks revealed by the ARKS ALMA program

High-resolution surveys with ALMA have revealed that substructures such as rings and gaps are common in protoplanetary disks, however it is not clear whether this is also true for debris disks due to their lower surface brightness and therefore the tendency for observations to be obtained at lower resolution with ALMA. Lower resolution observations do not commonly reveal systems of rings with radial gaps in debris disks, but the handful of high-resolution debris disk images with ALMA do resolve radial gaps in most, however this sample of only a few systems is insufficient to draw strong conclusions. Recently, the ALMA survey to Resolve exoKuiper belt Substructures (ARKS) was carried out to understand the high resolution structure of 18 debris disks. The sample spans a range of inclinations, allowing us to study both the radial and vertical structure in debris disks in detail. With an increasing volume of theoretical work exploring the signatures of planets imprinted on disks, understanding the high-resolution disk structure is important both for testing planet formation models and for constraining planetary system architecture. In this talk, we will present observations from the ARKS program and discuss ongoing modelling efforts, focusing particularly on the radial structure and non-parametric modelling approaches. We will discuss the prevalence of radial substructures in debris disks, present ongoing analyses on any correlations between disk features and outline some of the implications of the findings on planetary dynamics in these systems.