Orbit-superposition Dynamical Modeling of Barred Galaxies

Abstract Barred structures are important in understanding galaxy evolution, but they were not included explicitly most dynamical models for nearby galaxies due to their complicated morphological and kinematic properties. We modify the triaxial orbit-superposition Schwarzschild implementation by van den Bosch et al. include barred explicitly. The gravitational potential is a combination of spherical dark matter halo stellar mass; with 3D density distribution deprojected from observed 2D image using two-component deprojection method, including an axisymmetric disk bulge. consider figure rotation bar pattern speed as free parameter. validate method applying it mock integral field unit (IFU) data created N -body simulation boxy/peanut or X-shaped bar. Our model fits surface all features well. recovered well relative uncertainty smaller than 10%. Based on internal orbit model, we decompose into bar, boxy bulge, vertically extended structure disk, demonstrate that our recovers these generally well, similar true simulation. provides realistic way modeling IFU observations.