Did the Milky Way dwarf satellites enter the halo as a group?

Abstract

The dwarf satellite galaxies in the Local Group are generally considered to be hosted in dark matter subhalos that survived the disruptive processes during infall onto their host halos. It has recently been argued that if the majority of satellites entered the Milky Way halo in a group rather than individually, this could explain the spatial and dynamical peculiarities of its satellite distribution. Such groups were identified as dwarf galaxy associations that are found in the nearby Universe. In this paper we address the question whether galaxies in such associations can be the progenitors of the Milky Way satellite galaxies. We find that the dwarf associations are much more extended than would be required to explain the disk-like distribution of the Milky Way and Andromeda satellite galaxies. We further identify a possible minor filamentary structure, perpendicular to the supergalactic plane, in which the dwarf associations are located, that might be related to the direction of infall of a progenitor galaxy of the Milky Way satellites, if they are of tidal origin.

acc ApJ

References in corpus (21)

• Clumps and streams in the local dark matter distribution
• Are the Magellanic Clouds on their First Passage about the Milky Way?
• The Observed properties of Dark Matter on small spatial scales
• Hundreds of Milky Way Satellites? Luminosity Bias in the Satellite Luminosity Function
• Is the SMC Bound to the LMC? The HST Proper Motion of the SMC
• The Origin of the Bifurcation in the Sagittarius Stream
• Redefining the Missing Satellites Problem
• The spatial distribution of the Milky Way and Andromeda satellite galaxies
• Small Dwarf Galaxies Within Larger Dwarfs: Why Some Are Luminous While Most Go Dark
• Associations of Dwarf Galaxies
• The orbital poles of Milky Way satellite galaxies: a rotationally supported disc-of-satellites
• Infall of substructures onto a Milky Way-like dark halo
• Early Gas Stripping as the Origin of the Darkest Galaxies in the Universe
• Cosmic Ménage à Trois: The Origin of Satellite Galaxies On Extreme Orbits
• Satellites of Simulated Galaxies: survival, merging, and their relation to the dark and stellar halos
• Proper Motions of Dwarf Spheroidal Galaxies from Hubble Space Telescope Imaging. IV: Measurement for Sculptor
• Proper Motions of Dwarf Spheroidal Galaxies from Hubble Space Telescope Imaging. V: Final Measurement for Fornax
• Discs of Satellites: the new dwarf spheroidals
• Milky Way potentials in CDM and MOND. Is the Large Magellanic Cloud on a bound orbit?
• Satellite Systems around Galaxies in Hydrodynamic Simulations
• Extended Star Formation and Molecular Gas in the Tidal Arms near NGC3077

Cited by in corpus (70)

• Modified Newtonian Dynamics (MOND): Observational Phenomenology and Relativistic Extensions
• The VPOS: a vast polar structure of satellite galaxies, globular clusters and streams around the Milky Way
• Small scale problems of the $\Lambda$CDM model: a short review
• The dark matter crisis: falsification of the current standard model of cosmology
• Local-Group tests of dark-matter Concordance Cosmology: Towards a new paradigm for structure formation
• Galaxies as simple dynamical systems: observational data disfavor dark matter and stochastic star formation
• 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
• The Space Motion of Leo I: Hubble Space Telescope Proper Motion and Implied Orbit
• Mismatch and Misalignment: Dark Haloes and Satellites of Disc Galaxies
• The Milky Way's Disk of Classical Satellite Galaxies in Light of Gaia DR2
• Dark matters on the scale of galaxies
• Making Counter-Orbiting Tidal Debris: The Origin of the Milky Way Disc of Satellites
• On the persistence of two small-scale problems in ΛCDM
• The Spatial Distribution of Galactic Satellites in the LCDM Cosmology
• The grouping, merging and survival of subhaloes in the simulated Local Group
• MOND simulation suggests the origin of some peculiarities in the Local Group
• The multiplicity and anisotropy of galactic satellite accretion
• Can filamentary accretion explain the orbital poles of the Milky Way satellites?
• Does the dwarf galaxy system of the Milky Way originate from Andromeda?
• A Two Micron All-Sky Survey View of the Sagittarius Dwarf Galaxy: VI. s-Process and Titanium Abundance Variations Along the Sagittarius Stream
• Perseus I and the NGC 3109 association in the context of the Local Group dwarf galaxy structures
• What is a Galaxy? Cast your vote here...
• 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
• Accretion of the Magellanic system onto the Galaxy
• Evolution of galactic planes of satellites in the EAGLE simulation
• The Vast Polar Structure of the Milky Way Attains New Members
• The globular cluster system of the Milky Way: accretion in a cosmological context
• Using dwarf satellite proper motions to determine their origin
• 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
• 3D hydrodynamic simulations for the formation of the Local Group satellite planes
• Maximum Likelihood Fitting of Tidal Streams With Application to the Sagittarius Dwarf Tidal Tails
• Flattened structures of dwarf satellites around massive host galaxies in the MATLAS low-to-moderate density fields
• Local ultra faint dwarves as a product of Galactic processing during a Magellanic group infall
• Could the Magellanic Clouds be tidal dwarves expelled from a past-merger event occurring in Andromeda?
• DGSAT: Dwarf Galaxy Survey with Amateur Telescopes II. A catalogue of isolated nearby edge-on disk galaxies and the discovery of new low surface brightness systems
• When was the Large Magellanic Cloud accreted onto the Galaxy ?
• Revisiting the Role of M31 in the Dynamical History of the Magellanic Clouds
• The number of tidal dwarf satellite galaxies in dependence of bulge index
• The influences of the Magellanic Clouds on the Galaxy: Pole shift, warp, and star formation history
• The potential role of NGC 205 in generating Andromeda's vast thin co-rotating plane of satellite galaxies
• VLT Observations of NGC 1097's "dog-leg" tidal stream
• The satellite galaxy plane of NGC 4490 in light of ΛCDM - Sparsity of similarly extreme analogs and a possible role of satellite pairs
• The imprint of galaxy mergers on satellite planes in a cosmological context
• New dwarf galaxy candidates in the sphere of influence of the Local Volume spiral galaxy NGC2683
• On the absence of backsplash analogues to NGC 3109 in the $\Lambda$CDM framework
• The shapes and alignments of the satellites of the Milky Way and Andromeda
• New dwarf galaxy candidates in the sphere of influence of the Sombrero galaxy
• Are symmetric tidal streams possible with long-range dark-matter forces?
• The Magellanic Clouds are very rare in the IllustrisTNG simulations
• A modern view of galaxies and their stellar populations
• Kinematics of Milky Way Satellites: Mass Estimates, Rotation Limits, and Proper Motions
• The spatial distribution of satellites in galaxy clusters
• Gravitational hydrodynamics of large scale structure formation
• Dark Matter as gravitational solitons in the weak field limit
• Subhalos are Anisotropically Distributed and Aligned with the Smooth Matter Distribution of Their Host Halos
• IFUM Integrated Field Spectroscopy of Ten M104 Satellite Galaxy Candidates
• Morphological Mutations of Dwarf Galaxies
• The Morphological Origin of Dwarf Galaxies
• Investigating the origin of the Milky Way streams. A revised look at their orbital pole distribution in light of precession effects
• Are disks of satellites comprised of tidal dwarf galaxies?
• The long-term stability of the Vast Polar Structure and its connection to a possible previous passage of the LMC
• Modelling the chemical evolution
• The Future of Stellar Populations Studies in the Milky Way and the Local Group