Is the core-cusp problem a matter of perspective: Jeans Anisotropic Modeling against numerical simulations

Abstract

Mock member stars for 28 dwarf galaxies are constructed from the cosmological Auriga simulation, which reflect the dynamical status of realistic stellar tracers. The axis-symmetric Jeans Anisotropic Multi-Gaussian Expansion (JAM) modeling is applied to 6,000 star particles for each system, to recover the underlying matter distribution. The stellar or dark matter component individually is poorly recovered, but the total profile is constrained more reasonably. The mass within the half-mass radius of tracers is recovered the tightest, and the mass between 200 and 300 pc, $M(200-300\mathrm{pc})$, is constrained ensemble unbiasedly, with a scatter of 0.167 dex. If using 2,000 particles and only line-of-sight velocities with typical errors, the scatter in $M(200-300\mathrm{pc})$ is increased by $\sim$50%. Quiescent Sagittarius dSph-like systems and star-forming systems with strong outflows show distinct features, with $M(200-300\mathrm{pc})$ mostly under-estimated for the former, and likely over-estimated for the latter. The biases correlate with the dynamical status, which is a result of contraction motions due to tidal effects in quiescent systems or galactic winds in star-forming systems, driving them out of equilibrium. After including Gaia DR3 proper motion errors, we find proper motions can be as useful as line-of-sight velocities for nearby systems at $<\sim$60 kpc. By extrapolating the actual density profiles and the dynamical constraints down to scales below the resolution, we find the mass within 150 pc can be constrained ensemble unbiasedly, with a scatter of $\sim$0.255 dex. In the end, we show that the contraction of member stars in nearby systems is detectable based on Gaia DR3 proper motion errors.

arXiv commentaccepted by ApJ

References in corpus (84)

• The Gaia mission
• Planck 2013 results. XVI. Cosmological parameters
• The EAGLE project: Simulating the evolution and assembly of galaxies and their environments
• Where are the missing galactic satellites?
• E pur si muove: Galiliean-invariant cosmological hydrodynamical simulations on a moving mesh
• Cosmological SPH simulations: A hybrid multi-phase model for star formation
• Modeling feedback from stars and black holes in galaxy mergers
• The 2dF Galaxy Redshift Survey: Power-spectrum analysis of the final dataset and cosmological implications
• First results from the IllustrisTNG simulations: matter and galaxy clustering
• Small-Scale Challenges to the $\Lambda$CDM Paradigm
• Too big to fail? The puzzling darkness of massive Milky Way subhaloes
• A model for cosmological simulations of galaxy formation physics
• How supernova feedback turns dark matter cusps into cores
• Observational and Theoretical Constraints on Singular Dark Matter Halos
• The Core-Cusp Problem
• Cosmological Simulations with Self-Interacting Dark Matter I: Constant Density Cores and Substructure
• The Atlas3D project - XV. Benchmark for early-type galaxies scaling relations from 260 dynamical models: mass-to-light ratio, dark matter, Fundamental Plane and Mass Plane
• A New Calculation of the Ionizing Background Spectrum and the Effects of HeII Reionization
• A Method for Measuring (Slopes of) the Mass Profiles of Dwarf Spheroidal Galaxies
• Star counts in the Galaxy. Simulating from very deep to very shallow photometric surveys with the TRILEGAL code
• The Cores of Dwarf Galaxy Halos
• The cored distribution of dark matter in spiral galaxies
• The Auriga Project: the properties and formation mechanisms of disc galaxies across cosmic time
• Measuring the inclination and mass-to-light ratio of axisymmetric galaxies via anisotropic Jeans models of stellar kinematics
• Cosmological Simulations with Self-Interacting Dark Matter II: Halo Shapes vs. Observations
• The Star Formation Histories of Local Group Dwarf Galaxies I. Hubble Space Telescope / Wide Field Planetary Camera 2 Observations
• The unexpected diversity of dwarf galaxy rotation curves
• Mass loss from dwarf spheroidal galaxies: the origins of shallow dark matter cores and exponential surface brightness profiles
• Stellar Feedback in Dwarf Galaxy Formation
• Simulations of magnetic fields in isolated disk galaxies
• Cold dark matter heats up
• NIHAO IV: Core creation and destruction in dark matter density profiles across cosmic time
• Cosmology from the Chinese Space Station Optical Survey (CSS-OS)
• Dissipative hidden sector dark matter
• Dark matter heats up in dwarf galaxies
• Quenching and ram pressure stripping of simulated Milky Way satellite galaxies
• Magnetic field formation in the Milky Way-like disk galaxies of the Auriga project
• A dark matter profile to model diverse feedback-induced core sizes of $\Lambda$CDM haloes
• The properties of satellite galaxies in simulations of galaxy formation
• Stellar populations in the Galactic bulge
• Confronting theoretical models with the observed evolution of the galaxy population out to z=4
• The mass of our Milky Way
• Estimating the dark matter halo mass of our Milky Way using dynamical tracers
• Baryonic clues to the puzzling diversity of dwarf galaxy rotation curves
• The last breath of the Sagittarius dSph
• Populating Dark Matter Haloes with Galaxies: Comparing the 2dFGRS with Mock Galaxy Redshift Surveys
• Diversity of dark matter density profiles in the Galactic dwarf spheroidal satellites
• The core-cusp problem: a matter of perspective
• SDSS-IV MaNGA: variation of the stellar initial mass function in spiral and early-type galaxies
• Galaxy and Mass Assembly (GAMA): The halo mass of galaxy groups from maximum-likelihood weak lensing
• Dark Matter Cores and Cusps in Spiral Galaxies and their Explanations
• A large accretion disk of extreme eccentricity in the TDE ASASSN-14li
• Discrete dynamical modelling of omega Centauri
• A model for core formation in dark matter haloes and ultra diffuse galaxies by outflow episodes
• Aurigaia: mock Gaia DR2 stellar catalogues from the Auriga cosmological simulations
• Knowing the unknowns: uncertainties in simple estimators of galactic dynamical masses
• A discrete chemo-dynamical model of the dwarf spheroidal galaxy Sculptor: mass profile, velocity anisotropy and internal rotation
• Preliminary Target Selection for the DESI Milky Way Survey (MWS)
• The Dekel-Zhao profile: A mass-dependent dark-matter density profile with flexible inner slope and analytic potential, velocity dispersion, and lensing properties
• Assessing the Jeans Anisotropic Multi-Gaussian Expansion method with the Illustris simulation
• Microarcsecond Astrometry: Science Highlights from Gaia
• To beta or not to beta: can higher-order Jeans analysis break the mass-anisotropy degeneracy in simulated dwarfs?
• A missing outskirts problem? Comparisons between stellar halos in the Dragonfly Nearby Galaxies Survey and the TNG100 simulation
• Structure and kinematics of tidally limited satellite galaxies in LCDM
• A Gaia-PS1-SDSS (GPS1) Proper Motion Catalog Covering 3/4 of the Sky
• Proper Motion Catalog From SDSS \intersect USNO-B
• A cuspy dark matter halo
• A weak gravitational lensing recalibration of the scaling relations linking the gas properties of dark halos to their mass
• A discrete chemo-dynamical model of the giant elliptical galaxy NGC 5846: dark matter fraction, internal rotation and velocity anisotropy out to six effective radii
• The stellar halo of isolated central galaxies in the Hyper Suprime-Cam imaging survey
• The orbital PDF: general inference of the gravitational potential from steady-state tracers
• Simulating the Legacy Survey of Space and Time stellar content with TRILEGAL
• The orbital PDF: the dynamical state of Milky Way sized haloes and the intrinsic uncertainty in the determination of their masses
• What to expect from dynamical modelling of cluster haloes II. Investigating dynamical state indicators with Random Forest
• The cusp-core problem in gas-poor dwarf spheroidal galaxies
• The Response of Dark Matter Haloes to Gas Ejection: CuspCore II
• Predictions for the detection of Tidal Streams with Gaia using Great Circle Methods
• What to expect from dynamical modelling of cluster haloes I. The information content of different dynamical tracers
• Accurate mass estimates from the proper motions of dispersion-supported galaxies
• Non-Parametric Spherical Jeans Mass Estimation with B-splines
• Proper motion measurements for stars up to $100$ kpc with Subaru HSC and SDSS Stripe 82
• Star Formation in Ultraluminous Infrared Galaxies Probed with AKARI Near-Infrared Spectroscopy
• The extended Gaia-PS1-SDSS (GPS1+) proper motion catalog
• On the Tidal Formation of Dark Matter Deficient Galaxies

Cited by in corpus (4)

• Auriga Streams II: orbital properties of tidally disrupting satellites of Milky Way-mass galaxies
• Kinematics of the Sagittarius Dwarf Spheroidal core: A 5D Analysis for a 6D Methodology with Gaia DR3
• The tidal evolution of satellite galaxies in cosmological simulations: insights from COLIBRE
• Broken Expectations: The Effects of Modelling Assumptions on the Inferred Dark Matter Distribution in the Milky Way's Satellites