Morphological decomposition of TNG50 galaxies: methodology and catalogue

Abstract

We present MORDOR (MORphological DecOmposeR, a new algorithm for structural decomposition of simulated galaxies based on stellar kinematics. The code measures the properties of up to five structural components (a thin/cold and a thick/warm disc, a classical and a secular bulge, and a spherical stellar halo), and determines the properties of a stellar bar (if present). A comparison with other algorithms presented in the literature yields overall good agreement, with MORDOR displaying a higher flexibility in correctly decomposing systems and identifying bars in crowded environments (e.g. with ongoing fly-bys, often observable in cosmological simulations). We use MORDOR to analyse galaxies in the TNG50 simulation and find the following: ($i$) the thick disc component undergoes the strongest evolution in the binding energy-circularity plane, as expected when disc galaxies decrease their turbulent-rotational support with cosmic time; ($ii$) smaller galaxies (with stellar mass, $10^9\lesssim M_{\ast }/{\mathrm{M}}_{\odot }\le 5\times 10^9$) undergo a major growth in their disc components after $z\sim 1$, whereas ($iii$) the most massive galaxies ($5\times 10^{10}<M_{\ast }/{\mathrm{M}}_{\odot }\le 5\times 10^{11}$) evolve toward more spheroidal dominated objects down to $z=0$ due to frequent gravitational interactions with satellites; ($iv$) the fraction of barred galaxies grows rapidly at high redshift and stabilizes below $z\sim 2$, except for the most massive galaxies that show a decrease in the bar occupation fraction at low redshift; ($v$) galaxies with $M_{\ast }\sim 10^{11}{\mathrm{M}}_{\odot }$ exhibit the highest relative occurrence of bars at $z=0$, in agreement with observational studies. We publicly release MORDOR and the morphological catalogue of TNG50 galaxies.

arXiv comment20 pages, 20 figures. Submitted to MNRAS. MORDOR is available at https://github.com/thanatom/mordor. The catalogue is available at www.tng-project.org/zana22

References in corpus (65)

• Planck 2015 results. XIII. Cosmological parameters
• The EAGLE project: Simulating the evolution and assembly of galaxies and their environments
• E pur si muove: Galiliean-invariant cosmological hydrodynamical simulations on a moving mesh
• Introducing the Illustris Project: Simulating the coevolution of dark and visible matter in the Universe
• Simulating Galaxy Formation with the IllustrisTNG Model
• First results from the IllustrisTNG simulations: matter and galaxy clustering
• Secular Evolution and the Formation of Pseudobulges in Disk Galaxies
• First results from the IllustrisTNG simulations: the stellar mass content of groups and clusters of galaxies
• First results from the IllustrisTNG simulations: the galaxy color bimodality
• Properties of galaxies reproduced by a hydrodynamic simulation
• First results from the IllustrisTNG simulations: A tale of two elements -- chemical evolution of magnesium and europium
• Simulating galaxy formation with black hole driven thermal and kinetic feedback
• First results from the IllustrisTNG simulations: radio haloes and magnetic fields
• Introducing the Illustris Project: the evolution of galaxy populations across cosmic time
• First Results from the TNG50 Simulation: The evolution of stellar and gaseous disks across cosmic time
• Dancing in the dark: galactic properties trace spin swings along the cosmic web
• What determines the strength and the slowdown rate of bars ?
• Simulations of Galaxy Formation in a Lambda CDM Universe II: The Fine Structure of Simulated Galactic Disks
• Structural Properties of Pseudo-Bulges, Classical Bulges and Elliptical Galaxies: an SDSS Perspective
• The Horizon-AGN simulation: morphological diversity of galaxies promoted by AGN feedback
• Morphology, photometry and kinematics of N-body bars. I Three models with different halo central concentrations
• Evolution of Stellar Bars in Live Axisymmetric Halos: Recurrent Buckling and Secular Growth
• Evolution of the Bar Fraction in COSMOS: Quantifying the Assembly of the Hubble Sequence
• Secular Evolution in Disk Galaxies
• The formation of disc galaxies in high resolution moving-mesh cosmological simulations
• The Epoch of Disk Settling: z~1 to Now
• Introducing the NewHorizon simulation: Galaxy properties with resolved internal dynamics across cosmic time
• Galactic Angular Momentum in the Illustris Simulation: Feedback and the Hubble Sequence
• The Dependence of Bar Frequency on Galaxy Mass, Colour, and Gas Content -- and Angular Resolution -- in the Local Universe
• Geometry of Star-Forming Galaxies from SDSS, 3D-HST and CANDELS
• Galaxy Zoo and ALFALFA: Atomic Gas and the Regulation of Star Formation in Barred Disc Galaxies
• Feedback and the Structure of Simulated Galaxies at redshift z=2
• The two-phase formation history of spiral galaxies traced by the cosmic evolution of the bar fraction
• Chemical signatures of formation processes in the stellar populations of simulated galaxies
• Galaxy Zoo: An independent look at the evolution of the bar fraction over the last eight billion years from HST-COSMOS
• Characterization of galactic bars from 3.6 $\mu$m S${}^4$G imaging
• Galaxy Zoo: CANDELS Barred Disks and Bar Fractions
• Barred galaxies in the EAGLE cosmological hydrodynamical simulation
• Tidally induced bars in Illustris galaxies
• Orbital decomposition of CALIFA spiral galaxies
• The evolution of galaxy shapes in CANDELS: from prolate to oblate
• The buildup of strongly barred galaxies in the TNG100 simulation
• External versus internal triggers of bar formation in cosmological zoom-in simulations
• The stellar halos of ETGs in the IllustrisTNG simulations: the photometric and kinematic diversity of galaxies at large radii
• Barred Galaxies in the IllustrisTNG Simulation
• Galaxy Zoo: Stronger bars facilitate quenching in star forming galaxies
• A new implementation of the Schwarzschild method for constructing observationally-driven dynamical models of galaxies of all morphological types
• Bulge plus disc and Sérsic decomposition catalogues for 16,908 galaxies in the SDSS Stripe 82 co-adds: A detailed study of the $ugriz$ structural measurements
• Formation of galaxies in ΛCDM cosmologies. I. The fine structure of disc galaxies
• Photometric Decomposition of Barred Galaxies
• Kinematic decomposition of IllustrisTNG disk galaxies: morphology and relation with morphological structures
• Stellar, gas and dark matter content of barred galaxies
• Barred galaxies in the Illustris-1 and TNG100 simulations
• Identifying kinematic structures in simulated galaxies using unsupervised machine learning
• The two formation pathways of S0 galaxies
• Introducing galactic structure finder: the multiple stellar kinematic structures of a simulated Milky Way mass galaxy
• Mass of the dynamically hot inner stellar halo predicts the ancient accreted stellar mass
• The origin of bulges and discs in the CALIFA survey: I. Morphological evolution
• The Evolutionary Pathways of Disk-, Bulge-, and Halo-dominated Galaxies
• Automated bar detection in local disc galaxies from the SDSS - The colors of bars
• Morphology and kinematics of orbital components in CALIFA galaxies across the Hubble sequence
• Barred galaxies in cosmological zoom-in simulations: the importance of feedback
• Bar resilience to flybys in a cosmological framework
• More insights into bar quenching. Multi-wavelength analysis of four barred galaxies
• 2D Surface Brightness Modelling of Large 2MASS Galaxies I: Photometry and Structural Parameters

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• A Milky Way-like barred spiral galaxy at a redshift of 3
• Dynamical characterization of galaxies up to $z\sim 7$
• Early results from GLASS-JWST XIV: A first morphological atlas of the 1 < z < 5 Universe in the rest-frame optical
• The Three-Phase Evolution of the Milky Way
• MaNGIA: 10,000 mock galaxies for stellar population analysis
• The Physical Origin of the Mass-Size Relation and Its Scatter of Disk Galaxies
• Pattern speed evolution of barred galaxies in TNG50
• A too-many dwarf satellite galaxies problem in the MATLAS low-to-moderate density fields
• Galaxy formation physics behind bar formation: A view from cosmological hydrodynamical simulations
• Connection between galaxy morphology and dark-matter halo structure I: a running threshold for thin discs and size predictors from the dark sector
• Populating The Milky Way: Characterising Planet Demographics by Combining Galaxy Formation Simulations and Planet Population Synthesis Models
• BANG-MaNGA: A census of kinematic discs and bulges across mass and star formation in the local Universe
• Bar formation in submaximal discs: a challenge for ΛCDM
• Overmassive black holes in the early Universe can be explained by gas-rich, dark matter-dominated galaxies
• Decomposing galaxies with BANG: an automated morpho-kinematical decomposition of the SDSS-DR17 MaNGA survey
• The role of impact parameter in typical close galaxy flybys
• Bar instability and formation timescale across Toomre's $Q$ parameter and central mass concentration: slow bar formation or true stability
• The AGORA High-resolution Galaxy Simulations Comparison Project. VIII: Disk Formation and Evolution of Simulated Milky Way Mass Galaxy Progenitors at $1<z<5$
• The multi-wavelength Tully-Fisher relation in the TNG50 cosmological simulation
• Untangling Stellar Components of Galaxies: Evaluation of Dynamical Decomposition Methods in Simulated Galaxies with GalaxyChop
• Mock Observations: Morphological Analysis of Galaxies in TNG100 Simulations
• Amaryllis: a digital twin of the earliest galaxies in the Universe
• Bulgeless Evolution And the Rise of Discs (BEARD) II. The role of mergers in shaping the Milky Way analogues in TNG50
• The assembly history of NGC 1365 through chemical archaeology
• Two-phase formation of galaxies: the coevolution between galaxies and dark matter halos
• The Tremaine-Weinberg method at high redshifts
• The detectability of bars at high redshift: a case study using Euclid-like mock observations of TNG50 simulated galaxies
• Stealing galaxies from galaxy clusters
• The Cosmic Rush Hour: Rapid Formation of Bright, Massive, Disky, Star-Forming Galaxies as Signatures of Early-Universe Physics
• Bulgeless Evolution And the Rise of Discs (BEARD) III. A numerical simulation view of satellites around Milky-Way analogues