A new implementation of the Schwarzschild method for constructing observationally-driven dynamical models of galaxies of all morphological types
arXiv:1912.04288 · doi:10.3847/1538-4357/ab5fe0
Abstract
We present Forstand, a new code for constructing dynamical models of galaxies with the Schwarzschild orbit-superposition method. These models are constrained by line-of-sight kinematic observations and applicable to galaxies of all morphological types, including disks and triaxial rotating bars. Our implementation has several novel and improved features, is computationally efficient, and made publicly available. Using mock datasets taken from N-body simulations, we demonstrate that the pattern speed of a bar can be recovered with an accuracy of 10-20%, regardless of orientation, if the 3D shape of the galaxy is known or inferred correctly.
accepted by ApJ; the code is available at http://agama.software
References in corpus (15)
- Measuring the inclination and mass-to-light ratio of axisymmetric galaxies via anisotropic Jeans models of stellar kinematics
- Triaxial orbit based galaxy models with an application to the (apparent) decoupled core galaxy NGC 4365
- Imfit: A Fast, Flexible New Program for Astronomical Image Fitting
- Dynamical modelling of luminous and dark matter in 17 Coma early-type galaxies
- Peanuts, brezels and bananas: food for thought on the orbital structure of the Galactic bulge
- Recovering the intrinsic shape of early-type galaxies
- Recovery of the internal orbital structure of galaxies
- Six new supermassive black hole mass determinations from adaptive-optics assisted SINFONI observations
- Constraining the Mass Profiles of Stellar Systems: Schwarzschild Modeling of Discrete Velocity Datasets
- Applying Schwarzschild's orbit superposition method to barred or non-barred disc galaxies
- What the Milky Way bulge reveals about the initial metallicity gradients in the disc
- Constraining black hole masses from stellar kinematics by summing over all possible distribution functions
- Three-dimensional Keplerian orbit-superposition models of the nucleus of M31
- NGC 307 and the Effects of Dark-Matter Haloes on Measuring Supermassive Black Holes in Disc Galaxies
- Made-To-Measure Models of Self-Similar Triaxial Halos with Steep Inner Density Gradients