Treffer: Towards 3D Stellar Structure and Evolution Models of Stars

Current generation stellar structure and evolution (SSE) models primarily operate under the assumption of spherical symmetry. These models have proven extremely successful and have advanced our understanding of not just stellar physics but also that of exoplanets, galactic history, and cosmology. Despite these successes there are limitations which arise from parameterizing only by radius. Foremost among these is that the treatment of rotation and magnetic fields is extremely limited in 1D. The European Research Council has funded a synergy grant to develop a next generation, 3D, SSE program. This work is being conducted along two parallel branches: one, advances in the mature, 2D, ESTER code, and two: development of a new 3D program from scratch. Part of the mandate the 4D-STAR collaboration has been given is to make our products as widely useful to the scientific community as is feasible. As such we have representatives from many branches of stellar physics directly involved. However, we do not have representation from the hot subdwarf community. Here I will present the basic principles of the new program; however, the primary focus of this talk is to solicit feedback from the hot subdwarf community as to what you would like to see in a next generation SSE program with the aim of answering outstanding questions about stellar structure and evolution in your field.