The Link between Galactic Satellite Orbits and Subhalo Accretion

Abstract

We calculate the orbital angular momentum of dark matter subhaloes in the Aquarius simulations of cold dark matter galactic haloes. We calculate the orientation of their angular momentum relative to that of the spin vector of their host halo and find a variety of different configurations. All six Aquarius haloes contain statistically significant populations of subhalo orbits that are aligned with the main halo spin. All haloes posses a population of subhaloes that rotates in the same direction as the main halo and three of them possess, in addition, a population that rotates in the opposite direction. These configurations arise from the filamentary accretion of subhaloes. Quasi-planar distributions of coherently rotating satellites, such as those inferred in the Milky Way and other galaxies, arise naturally in simulations of a $\Lambda$CDM universe.

10 pages, 8 figures, higher quality versions of some figures available at http://astro.dur.ac.uk/~d50wse/. Accepted by MNRAS

References in corpus (10)

• The spin and shape of dark matter haloes in the Millennium simulation of a LambdaCDM universe
• A blueprint for detecting supersymmetric dark matter in the Galactic halo
• Phase-space structure in the local dark matter distribution and its signature in direct detection experiments
• Leo V: A Companion of a Companion of the Milky Way Galaxy
• The orbital poles of Milky Way satellite galaxies: a rotationally supported disc-of-satellites
• Infall of substructures onto a Milky Way-like dark halo
• Discs of Satellites: the new dwarf spheroidals
• Satellite Systems around Galaxies in Hydrodynamic Simulations
• Discovery of a Faint Old Stellar System at 150 kpc
• Orbital Dependence of Galaxy Properties in Satellite Systems of Galaxies

Cited by in corpus (72)

• Small-Scale Challenges to the $\Lambda$CDM Paradigm
• A Vast Thin Plane of Co-rotating Dwarf Galaxies Orbiting the Andromeda Galaxy
• The VPOS: a vast polar structure of satellite galaxies, globular clusters and streams around the Milky Way
• Theory of Dark Matter Superfluidity
• Small scale problems of the $\Lambda$CDM model: a short review
• Star formation sustained by gas accretion
• Structure Finding in Cosmological Simulations: The State of Affairs
• Dwarf Galaxy Planes: the discovery of symmetric structures in the Local Group
• The rotationally stabilized VPOS and predicted proper motions of the Milky Way satellite galaxies
• Co-orbiting satellite galaxy structures are still in conflict with the distribution of primordial dwarf galaxies
• The Three-Dimensional Structure of the M31 Satellite System; Strong Evidence for an Inhomogeneous Distribution of Satellites
• The Planes of Satellite Galaxies Problem, Suggested Solutions, and Open Questions
• Planes of satellite galaxies and the cosmic web
• Mismatch and Misalignment: Dark Haloes and Satellites of Disc Galaxies
• A dynamical model of the local cosmic expansion
• The Milky Way's Disk of Classical Satellite Galaxies in Light of Gaia DR2
• A thousand shadows of Andromeda: rotating planes of satellites in the Millennium-II cosmological simulation
• The outer halo globular cluster system of M31 - II. Kinematics
• Planes of satellite galaxies: when exceptions are the rule
• The splashback radius of halos from particle dynamics. I. The SPARTA algorithm
• Dark matters on the scale of galaxies
• The slight spin of the old stellar halo
• Kinematics of Outer Halo Globular Clusters in M31
• The Spatial Distribution of Galactic Satellites in the LCDM Cosmology
• Galaxy Formation in WDM Cosmology
• The multiplicity and anisotropy of galactic satellite accretion
• Can filamentary accretion explain the orbital poles of the Milky Way satellites?
• The formation of shell galaxies similar to NGC 7600 in the cold dark matter cosmogony
• Spin flips I: Evolution of the angular momentum orientation of Milky Way-mass dark matter haloes
• Alignments between galaxies, satellite systems and haloes
• A new spin on disks of satellite galaxies
• A comparison of the distribution of satellite galaxies around Andromeda and the results of $\Lambda$CDM simulations
• Tracing satellite planes in the Sculptor group: I. Discovery of three faint dwarf galaxies around NGC 253
• Are rotating planes of satellite galaxies ubiquitous?
• Evolution of galactic planes of satellites in the EAGLE simulation
• Simulated ΛCDM analogues of the thin Plane of Satellites around the Andromeda galaxy are not kinematically coherent structures
• The Role of Baryons in Creating Statistically Significant Planes of Satellites around Milky Way-Mass Galaxies
• The globular cluster system of the Milky Way: accretion in a cosmological context
• The extended structure of the dwarf irregular galaxies Sextans A and Sextans B. Signatures of tidal distortion in the outskirts of the Local Group
• Evidence for Early Filamentary Accretion from the Andromeda Galaxy's Thin Plane of Satellites
• The Clustering of Orbital Poles Induced by the LMC: Hints for the Origin of Planes of Satellites
• Co-orbiting planes of sub-halos are similarly unlikely around paired and isolated hosts
• The Milky Way's stellar streams and globular clusters do not align in a Vast Polar Structure
• On the Stability of Satellite Planes I: Effects of Mass, Velocity, Halo Shape and Alignment
• The SIBELIUS Project: E Pluribus Unum
• The twisted dark matter halo of the Milky Way
• Flattened structures of dwarf satellites around massive host galaxies in the MATLAS low-to-moderate density fields
• A Formation Scenario for the Disk of Satellites: Accretion of Satellites during Mergers
• The spatial distribution of Milky Way satellites, gaps in streams and the nature of dark matter
• The orientation of planes of dwarf galaxies in the quasi-linear Universe
• A Two-Point Correlation Function For Galactic Halo Stars
• Subhalo accretion through filaments
• ZOMG III: The effect of Halo Assembly on the Satellite Population
• Subhaloes gone Notts: Subhaloes as tracers of the dark matter halo shape
• Confronting Models of Dwarf Galaxy Quenching with Observations of the Local Group
• The potential role of NGC 205 in generating Andromeda's vast thin co-rotating plane of satellite galaxies
• Is there a disk of satellites around the Milky Way?
• The imprint of galaxy mergers on satellite planes in a cosmological context
• The Unusual Milky Way-Local Sheet System: Implications for Spin Strength and Alignment
• New dwarf galaxy candidates in the sphere of influence of the Local Volume spiral galaxy NGC2683
• New dwarf galaxy candidates in the sphere of influence of the Sombrero galaxy
• Origin and Evolution of Structure and Nucleosynthesis for Galaxies in the Local Group
• The Magellanic Clouds are very rare in the IllustrisTNG simulations
• Planes of satellites around simulated disk galaxies II: Time-persistent planes of kinematically-coherent satellites in $\Lambda$CDM
• On the origin of the asymmetric dwarf galaxy distribution around Andromeda
• The spatial distribution of satellites in galaxy clusters
• The kinematics of globular clusters systems in the outer halos of the Aquarius simulations
• A Study of the Properties and Dynamics of the Disk of Satellites in a Milky-Way-like Galaxy System
• Dark sector domain walls could explain the observed planes of satellites
• IFUM Integrated Field Spectroscopy of Ten M104 Satellite Galaxy Candidates
• The long-term stability of the Vast Polar Structure and its connection to a possible previous passage of the LMC
• Investigating the origin of the Milky Way streams. A revised look at their orbital pole distribution in light of precession effects