SPAMMS: applications and use cases for the 3D spectroscopic analysis technique to study deformed massive stars

Abstract

Whether it be due to rapid rotation or binary interactions, deviations from spherical symmetry are common in massive stars. These deviations from spherical symmetry are known to cause non-uniform distributions of various parameters across the surface including temperature, which can drive internal mixing processes within the envelopes of these massive stars. Despite how common these 3D distortions are, they are often neglected in spectroscopic analyses. We present a new spectral analysis code called SPAMMS (Spectroscopic PAtch Model for Massive Stars) specifically designed to analyze non-spherical systems. We discuss how the code works and discuss its assumptions. Furthermore, we demonstrate how SPAMMS can be applied to a variety of different types of systems and we show how it can model 3D effects in a way that current analysis techniques are not able to.