Data employed to develop the work "Environmental interactions in Class II systems and their impact on the disk-planet architecture"

This dataset accompanies the study “Environmental interactions in Class II systems and their impact on the disk–planet architecture.” The work investigates how environmental perturbations — specifically stellar flybys and infalling gas cloudlets — influence the evolution of protoplanetary disks hosting already-formed planets during the Class II phase. Using three-dimensional hydrodynamical simulations performed with the Phantom SPH code, the study models gas and multi-species dust dynamics in a disk containing two resonant giant planets. The simulations explore how external interactions reshape disk morphology, excite eccentricity, alter angular momentum transport, and modify planetary accretion processes. The shared data includes the simulation outputs analyzed in the article, the input files, and some videos for visualization. Codes used. Phantom -> https://github.com/danieljprice/phantom. Splash -> https://github.com/danieljprice/splash. Architecture of the dataset. The dataset is provided in the compressed archive Data.tar.xz, which is organized into three main folders: isolated, infall, and flyby. The isolated directory contains the reference simulation and serves as the initial condition for the perturbed scenarios. The .setup file defines the initial configuration of the central star and protoplanetary disk. The file moddump_addplanets_MMR.f90 is a custom Phantom utility that modifies the original single–star–disk setup by adding two planets in a mean-motion resonance configuration. Common files in folders. The .in file contains the runtime parameters and simulation settings that Phantom requires to evolve the system. The .ev files contain the evolution of the parameters for each sink particle. Simulation outputs are stored in the name_XXXXX files, corresponding to evolutionary stages at 0, 100, 200, and 300 orbital periods of the outermost planet. These snapshots contain the gas and dust distributions used to analyze the dynamical evolution of the isolated, infall, and flyby scenarios. The file disc_01000 is the snapshot in which the stellar flyby and the gas cloudlet were added to the simulation.