Stellar Dynamical Modeling - Accuracy of 3D Density Estimation for Edge-on Axisymmetric Galaxies
arXiv:2102.04189 · doi:10.1088/1674-4527/21/6/152
Abstract
From Rybicki's analysis using the Fourier slice theorem, mathematically it is possible to reproduce uniquely an edge-on axisymmetric galaxy's 3D light distribution from its 2D surface brightness. Utilizing galaxies from a cosmological simulation, we examine the ability of Syer and Tremaine's made-to-measure method and Schwarzschild's method for stellar dynamical modeling to do so for edge-on oblate axisymmetric galaxies. Overall, we find that the methods do not accurately recover the 3D distributions, with the made-to-measure method producing more accurate estimates than Schwarzschild's method. Our results have implications broader than just luminosity density, and affect other luminosity-weighted distributions within galaxies, for example, age and metallicity.
arXiv commentAccepted for publication by Research in Astronomy and Astrophysics. 26 pages, 15 figures, 4 tables
References in corpus (40)
- A Universal Density Profile from Hierarchical Clustering
- The Structure of Cold Dark Matter Halos
- Overview of the SDSS-IV MaNGA Survey: Mapping Nearby Galaxies at Apache Point Observatory
- Adaptive spatial binning of integral-field spectroscopic data using Voronoi tessellations
- CALIFA, the Calar Alto Legacy Integral Field Area survey: I. Survey presentation
- The Atlas3D project -- I. A volume-limited sample of 260 nearby early-type galaxies: science goals and selection criteria
- The SAURON project - IV. The mass-to-light ratio, the virial mass estimator and the fundamental plane of elliptical and lenticular galaxies
- The SAMI Galaxy Survey: instrument specification and target selection
- The MUSE Hubble Ultra Deep Field Survey: I. Survey description, data reduction and source detection
- Dynamical Modeling of Velocity Profiles: The Dark Halo Around the Elliptical Galaxy NGC2434
- Triaxial orbit based galaxy models with an application to the (apparent) decoupled core galaxy NGC 4365
- Made-to-measure N-body systems
- Difficulties with Recovering The Masses of Supermassive Black Holes from Stellar Kinematical Data
- Made-to-Measure models of the Galactic Box/Peanut bulge: stellar and total mass in the bulge region
- A Self-Consistent Dynamical Model for the COBE Detected Galactic Bar
- NMAGIC: Fast Parallel Implementation of a Chi-Squared-Made-to-Measure Algorithm for Modelling Observational Data
- Gaia Data Release 1, Pre-processing and source list creation
- Efficient solution of the anisotropic spherically-aligned axisymmetric Jeans equations of stellar hydrodynamics for galactic dynamics
- On the deprojection of axisymmetric bodies
- Tailoring triaxial N-body models via a novel made-to-measure method
- A new implementation of the Schwarzschild method for constructing observationally-driven dynamical models of galaxies of all morphological types
- A new code for orbit analysis and Schwarzschild modelling of triaxial stellar systems
- Elliptical galaxies with rapidly decreasing velocity dispersion profiles: NMAGIC models and dark halo parameter estimates for NGC 4494
- Made-to measure galaxy models - I Methodology
- Evaluating the ability of triaxial Schwarzschild modelling to estimate properties of galaxies from the Illustris simulation
- Fitting functions for dark matter density profiles
- A study of stellar orbit fractions: simulated IllustrisTNG galaxies compared to CALIFA observations
- Made-to-measure galaxy models - II Elliptical and Lenticular Galaxies
- SDSS-IV MaNGA: Internal mass distributions and orbital structures of early-type galaxies and their dependence on environment
- Regularizing made-to-measure particle models of galaxies
- Disc galaxy modelling with a particle-by-particle M2M method
- Deprojection of Axially Symmetric Objects
- Non-parametric Triaxial Deprojection of Elliptical Galaxies
- On the Uncertainties of the Central Density in Axisymmetric Galaxies due to Deprojection
- Made-to-measure modeling of observed galaxy dynamics
- Lopsidedness of self-consistent galaxies by the external field effect of clusters
- Chemo-dynamical modelling with Schwarzschild's method
- Made-to-measure galaxy modelling utilising absorption line strength data
- Made-To-Measure Models of Self-Similar Triaxial Halos with Steep Inner Density Gradients
- Deprojection of light distributions of nearby systems: perspective effect and non-uniqueness