The fragility of thin discs in galaxies -- I. Building tailored N-body galaxy models
arXiv:2302.03349 · doi:10.1093/mnras/stad419
Abstract
Thin stellar discs on both galactic and nuclear, sub-kpc scales are believed to be fragile structures that would be easily destroyed in major mergers. In turn, this makes the age-dating of their stellar populations a useful diagnostics for the assembly history of galaxies. We aim at carefully exploring the fragility of such stellar discs in intermediate- and low- mass encounters, using high-resolution N-body simulations of galaxy models with structural and kinematic properties tailored to actually observed galaxies. As a first but challenging step, we create a dynamical model of FCC 170, a nearly edge-on galaxy in the Fornax cluster with multiple galactic components and including both a galactic scale and nuclear stellar disc (NSD), using detailed kinematic data from the Multi Unit Spectroscopic Explorer and a novel method for constructing distribution function-based self-consistent galaxy models. We then create N-body realisations of this model and demonstrate that it remains in equilibrium and preserves its properties over many Gyr, when evolved with a sufficiently high particle number. However, the NSD is more prone to numerical heating, which gradually increases its thickness by up to 22 per cent in 10 Gyr even in our highest-resolution runs. Nevertheless, these N-body models can serve as realistic representations of actual galaxies in merger simulations.
arXiv comment13 pages, 9 figures
References in corpus (85)
- The Structure of Cold Dark Matter Halos
- The cosmological simulation code GADGET-2
- Coevolution (Or Not) of Supermassive Black Holes and Host Galaxies
- Introducing the Illustris Project: Simulating the coevolution of dark and visible matter in the Universe
- Parametric Recovery of Line-of-Sight Velocity Distributions from Absorption-Line Spectra of Galaxies via Penalized Likelihood
- Improving the full spectrum fitting method: accurate convolution with Gauss-Hermite functions
- Adaptive spatial binning of integral-field spectroscopic data using Voronoi tessellations
- Properties of galaxies reproduced by a hydrodynamic simulation
- GIZMO: A New Class of Accurate, Mesh-Free Hydrodynamic Simulation Methods
- Introducing the Illustris Project: the evolution of galaxy populations across cosmic time
- Automated data reduction workflows for astronomy
- Properties of Galaxy Groups in the SDSS: I.-- The Dependence of Colour, Star Formation, and Morphology on Halo Mass
- The Illustris simulation: the evolving population of black holes across cosmic time
- Forming Disk Galaxies in Lambda CDM Simulations
- Simulations of Galaxy Formation in a Lambda CDM Universe II: The Fine Structure of Simulated Galactic Disks
- Constraints from Dynamical Friction on the Dark Matter Content of Barred Galaxies
- AGAMA: Action-based galaxy modelling architecture
- Measuring the inclination and mass-to-light ratio of axisymmetric galaxies via anisotropic Jeans models of stellar kinematics
- Axisymmetric Dynamical Models of the Central Regions of Galaxies
- Evolutionary stellar population synthesis with MILES - II. Scaled-solar and α-enhanced models
- The Fundamental Scaling Relations of Elliptical Galaxies
- Triaxial orbit based galaxy models with an application to the (apparent) decoupled core galaxy NGC 4365
- Dark matter distribution in the Coma cluster from galaxy kinematics: breaking the mass-anisotropy degeneracy
- Environmental Dependence of Properties of Galaxies in the Sloan Digital Sky Survey
- Towards a Concordant Model of Halo Occupation Statistics
- Galaxy Disks
- The influence of gas on the structure of merger remnants
- Actions for axisymmetric potentials
- The Effect of Mass Ratio on the Morphology and Time-scales of Disc Galaxy Mergers
- Equilibrium Disk-Bulge-Halo Models for the Milky Way and Andromeda Galaxies
- Generating Equilibrium Dark Matter Halos: Inadequacies of the Local Maxwellian Approximation
- Internal and Collective Properties of Galaxies in the Sloan Digital Sky Survey
- Growth and activity of black holes in galaxy mergers with varying mass ratios
- Hunting for the Dark Matter Wake Induced by the Large Magellanic Cloud
- MAMPOSSt: Modelling Anisotropy and Mass Profiles of Observed Spherical Systems. I. Gaussian 3D velocities
- Made-to-measure N-body systems
- Axisymmetric Three-Integral Models for Galaxies
- NMAGIC: Fast Parallel Implementation of a Chi-Squared-Made-to-Measure Algorithm for Modelling Observational Data
- Forming disk galaxies in wet major mergers. I. Three fiducial examples
- Can Gas prevent the Destruction of Thin Stellar Discs by Minor Mergers?
- The ongoing assembly of a central cluster galaxy: Phase-space substructures in the halo of M87
- An iterative method for the construction of N-body galaxy models in collisionless equilibrium
- The Fornax 3D project: unveiling the thick disk origin in FCC 170: signs of accretion?
- Formation and Incidence of Shell Galaxies in the Illustris Simulation
- Energy equipartition between stellar and dark matter particles in cosmological simulations results in spurious growth of galaxy sizes
- How to break the density-anisotropy degeneracy in spherical stellar systems
- Action-based distribution functions for spheroidal galaxy components
- The Destruction of Thin Stellar Disks Via Cosmologically Common Satellite Accretion Events
- The Fornax3D project: overall goals, galaxy sample, MUSE data analysis and initial results
- The unorthodox evolution of major merger remnants into star-forming spiral galaxies
- Galaxy luminosity function per morphological type up to z=1.2
- Spurious heating of stellar motions in simulated galactic disks by dark matter halo particles
- The fate of disk galaxies in IllustrisTNG clusters
- The shapes of spiral arms in the SG survey and their connection with stellar bars
- The Fornax3D project: Tracing the assembly history of the cluster from the kinematic and line-strength maps
- External versus internal triggers of bar formation in cosmological zoom-in simulations
- Nuclear Stellar Disks in Spiral Galaxies
- Self-consistent flattened isochrone models
- Nuclear stellar discs in early-type galaxies --- II. Photometric properties
- Spiral instabilities: Mechanism for recurrence
- Nuclear stellar discs in low-luminosity elliptical galaxies: NGC 4458 and NGC 4478
- A new implementation of the Schwarzschild method for constructing observationally-driven dynamical models of galaxies of all morphological types
- Analytical Solutions to the Mass-Anisotropy Degeneracy with Higher Order Jeans Analysis: A General Method
- Mergers in Galaxy Groups - I. Structure and Properties of Elliptical Remnants
- Bringing the Galaxy's dark halo to life
- On the orbits that generate the X-shape in the Milky Way bulge
- A forming, dust enshrouded disk at z=0.43: the first example of a late type disk rebuilt after a major merger?
- The impact of spurious collisional heating on the morphological evolution of simulated galactic discs
- The Fornax3D project: Assembly histories of lenticular galaxies from a combined dynamical and population orbital analysis
- Applying Schwarzschild's orbit superposition method to barred or non-barred disc galaxies
- Disc galaxies formed from major mergers in Illustris
- The orbital content of bars: The origin of 'non-x1-tree', bar-supporting orbits
- Strong spiral arms drive secular growth of pseudo bulges in disk galaxies
- Galaxy and Mass Assembly (GAMA): Formation and Growth of Elliptical Galaxies in the Group Environment
- Kinematic footprint of the Milky Way spiral arms in Gaia EDR3
- A new dynamically self-consistent version of the Besançon Galaxy Model
- Self-consistent bulge/disk/halo galaxy dynamical modeling using integral field kinematics
- Two interacting galaxies hiding as one, revealed by MaNGA
- On the fragility of nuclear stellar discs against galaxy mergers: surviving photometric and kinematic signatures of nuclear discs
- How the bar properties affect the induced spiral structure
- Nuclear discs as clocks for the assembly history of early-type galaxies: the case of NGC4458
- The young nuclear stellar disc in the SB0 galaxy NGC 1023
- Near- to mid-Infrared Observations of Galaxy Mergers: NGC2782 and NGC7727
- The survival of stellar discs in Fornax-like environments, from TNG50 to real galaxies
- Old and New Major Mergers in the SOSIMPLE galaxy, NGC 7135