Angular momentum distribution of hot gas and implications for disk galaxy formation

Abstract

We study the angular momentum profiles both for dark matter and for gas within virialized halos, using a statistical sample of halos drawn from cosmological hydrodynamics simulations. Three simulations have been analyzed, one is the ``non-radiative'' simulation, and the other two have radiative cooling. We find that the gas component on average has a larger spin and contains a smaller fraction of mass with negative angular momentum than its dark matter counterpart in the non-radiative model. As to the cooling models, the gas component shares approximately the same spin parameter as its dark matter counterpart, but the hot gas has a higher spin and is more aligned in angular momentum than dark matter, while the opposite holds for the cold gas. After the mass of negative angular momentum is excluded, the angular momentum profile of the hot gas component approximately follows the universal function originally proposed by Bullock et al. for dark matter, though the shape parameter $\mu$ is much larger for hot gas and is comfortably in the range required by observations of disk galaxies. Since disk formation is related to the distribution of hot gas that will cool, our study may explain the fact that the disk component of observed galaxies contains a smaller fraction of low angular momentum material than dark matter in halos.

30 pages, 12 figures, 4 tables, accepted for publication in ApJ

References in corpus (27)

• Statistical Properties of X-ray Clusters: Analytic and Numerical Comparisons
• The Formation of Galactic Disks
• Hierarchical Galaxy Formation
• Concentrations of Dark Halos from their Assembly Histories
• The size distribution of galaxies in the Sloan Digital Sky Survey
• A universal angular momentum profile for galactic halos
• Triaxial Modeling of Halo Density Profiles with High-resolution N-body Simulations
• The Formation of Disk Galaxies
• The Growth and Structure of Dark Matter Haloes
• Semi-analytic predictions for statistical properties of X-ray clusters of galaxies in cold dark matter universes
• The Angular Momentum of Gas in Proto-Galaxies I. Implications for the Formation of Disk Galaxies
• Cosmic Shear from Galaxy Spins
• The Formation of Disk-Bulge-Halo Systems and the Origin of the Hubble Sequence
• Testing Tidal-Torque Theory: II. Alignment of Inertia and Shear and the Characteristics of Proto-haloes
• The local space density of Sb-Sdm galaxies as function of their scalesize, surface brightness and luminosity
• The Origin of the Density Distribution of Disk Galaxies: A New Problem for the Standard Model of Disk Formation
• The Angular Momentum Content of Dwarf Galaxies: New Challenges for the Theory of Galaxy Formation
• Galaxy Spin Statistics and Spin-Density Correlation
• Nonlinear Stochastic Biasing of Galaxies and Dark Halos in Cosmological Hydrodynamic Simulations
• Non-linear evolution of the angular momentum of protostructures from tidal torques
• Merger Histories in Warm Dark Matter Structure Formation Scenario
• Galaxy Formation in Preheated Intergalactic Media
• Kinetic Sunyaev-Zel'dovich effect from halo rotation
• Cosmological SPH simulations with four million particles: statistical properties of X-ray clusters in a low-density universe
• The Angular Momentum Distribution within Halos in Different Dark Matter Models
• Properties of disk galaxies in a hierarchical formation scenario
• Angular Momentum Profiles of Warm Dark Matter Halos

Cited by in corpus (53)

• Massive black hole seeds from low angular momentum material
• The Anisotropic Distribution of Galactic Satellites
• A Revised Model for the Formation of Disk Galaxies: Low Spin and Dark-Halo Expansion
• Connecting Angular Momentum and Galactic Dynamics: The complex Interplay between Spin, Mass, and Morphology
• The Causes of Halo Shape Changes Induced by Cooling Baryons: Disks Versus Substructures
• Rigging dark halos: why is hierarchical galaxy formation consistent with the inside-out build-up of thin discs?
• The Alignment between the Distribution of Satellites and the Orientation of their Central Galaxy
• Intrinsic Ellipticity Correlation of SDSS Luminous Red Galaxies and Misalignment with their Host Dark Matter Halos
• Galaxy alignments: Theory, modelling and simulations
• Angular Momentum Acquisition in Galaxy Halos
• The alignment and shape of dark matter, stellar, and hot gas distributions in the EAGLE and cosmo-OWLS simulations
• On the Origin of Exponential Galaxy Disks
• Fossil evidence for spin alignment of SDSS galaxies in filaments
• Angular momentum properties of haloes and their baryon content in the Illustris simulation
• The REQUIEM Survey I: A Search for Extended Ly-Alpha Nebular Emission Around 31 z>5.7 Quasars
• Building disc structure and galaxy properties through angular momentum: The DARK SAGE semi-analytic model
• The Angular Momentum Distribution of Gas and Dark Matter in Galactic Halos
• Shape, spin and baryon fraction of clusters in the MareNostrum Universe
• Interpreting the Evolution of the Size - Luminosity Relation for Disk Galaxies from Redshift 1 to the Present
• High Angular Momentum Halo Gas: a Feedback and Code-Independent Prediction of LCDM
• Are Great Disks Defined by Satellite Galaxies in Milky-Way Type Halos Rare in $\Lambda$CDM model?
• The Alignment between Satellites and Central Galaxies: Theory vs. Observations
• The angular momentum of cold dark matter haloes with and without baryons
• Halo Shapes From Weak Lensing: The Impact of Galaxy--Halo Misalignment
• How to get cool in the heat: comparing analytic models of hot, cold, and cooling gas in haloes and galaxies with EAGLE
• Spin flips I: Evolution of the angular momentum orientation of Milky Way-mass dark matter haloes
• 3D Spectroscopy with VLT/GIRAFFE - IV: Angular Momentum and Dynamical Support of Intermediate Redshift Galaxies
• Testing models of supermassive black hole seed formation through gravity waves
• On the origin of the angular momentum properties of gas and dark matter in galactic halos and its implications
• The angular momentum of cosmological coronae and the inside-out growth of spiral galaxies
• Intrinsic Inclination of Galaxies embedded in Cosmic Sheets and its Cosmological Implications: An Analytic Calculation
• Precision Cosmology
• Internal Alignments of Red Versus Blue Discs in Dark Matter Halos
• Spin Flips - II. Evolution of dark matter halo spin orientation, and its correlation with major mergers
• The segregation of baryons and dark matter during halo assembly
• The scaling relation between baryonic mass and stellar disc size of morphologically late-type galaxies
• The peculiar velocities of satellites of external disk galaxies
• Galaxy Formation and the Cosmological Angular Momentum Problem
• Statistics of Magnification Perturbations by Substructure in the Cold Dark Matter Cosmological Model
• A random-walk model for dark matter halo spins
• Evidence for a Rotational Component in the Circumgalactic Medium of Nearby Galaxies
• The mass-dependent star formation histories of disk galaxies: infall model versus observations
• A universal angular momentum profile for dark matter haloes
• Gas Accretion and Angular Momentum
• Tilted outer and inner structures in edge-on galaxies?
• Origin of reduced dynamical friction by dark matter halos with net prograde rotation
• Stellar angular momentum distribution linked to galaxy morphology
• The morphology of star-forming gas and its alignment with galaxies and dark matter haloes in the EAGLE simulations
• How stars formed in warps settle into (and contaminate) thick discs
• Angular momentum - mass relation for dark matter haloes
• Spin transfer from dark matter to gas during halo formation
• Galaxy-halo internal alignments across cosmic time
• Effect of Neutrinos on Angular Momentum of Dark Matter Halo