Physics Of Eclipsing Binaries. VII. Interferometric module

Abstract: Interferometric measurements are essential to constrain models of stellar systems, by spatially resolving angular distances and diameters well below the classical diffraction limit. In this work, we describe the interferometric module of Phoebe, which could be used just for this purpose. Since binaries in Phoebe are represented by a triangular mesh, our complex model is based on the integration over triangles. Consequently, Roche distortion, rotation, non-synchronicity, misalignment, eclipses of components, darkening, reflection, or irradiation are all accurately accounted for. For comparison purposes, we provide a simplified model, where components are represented by circular disks. The key point of our approach is a possibility of combination with other datasets (light curves, radial velocities), which allows to construct robust models of stellar systems. This draft refers to a development version of Phoebe, available at https://github.com/miroslavbroz/phoebe2/tree/interferometry . It is not yet included in the official Phoebe repository!