The Planes of Satellite Galaxies Problem, Suggested Solutions, and Open Questions

@article{Pawlowski2018ThePO,
  title={The Planes of Satellite Galaxies Problem, Suggested Solutions, and Open Questions},
  author={Marcel S. Pawlowski},
  journal={arXiv: Astrophysics of Galaxies},
  year={2018}
}
  • M. Pawlowski
  • Published 7 February 2018
  • Physics
  • arXiv: Astrophysics of Galaxies
Satellite galaxies of the Milky Way and of the Andromeda galaxy have been found to preferentially align in significantly flattened planes of satellite galaxies, and available velocity measurements are indicative of a preference of satellites in those structures to co-orbit. There is increasing evidence that such kinematically correlated satellite planes are also present around more distant hosts. Detailed comparisons show that similarly anisotropic phase-space distributions of sub-halos are… 

Figures from this paper

The coherent motion of Cen A dwarf satellite galaxies remains a challenge for ΛCDM cosmology

The plane-of-satellites problem is one of the most severe small-scale challenges for the standard Λ cold dark matter (ΛCDM) cosmological model: Several dwarf galaxies around the Milky Way and

Planes of satellites around Milky Way/M31-mass galaxies in the FIRE simulations and comparisons with the Local Group

We examine the prevalence, longevity, and causes of planes of satellite dwarf galaxies, as observed in the Local Group. We use 14 Milky Way/Andromeda-(MW/M31) mass host galaxies from the Feedback

Phase-Space Correlations among Systems of Satellite Galaxies

Driven by the increasingly complete observational knowledge of systems of satellite galaxies, mutual spatial alignments and relations in velocities among satellites belonging to a common host have

Are Disks of Satellites Comprised of Tidal Dwarf Galaxies?

It was found that satellites of nearby galaxies can form flattened co-rotating structures called disks of satellites or planes of satellites. Their existence is not expected by the current galaxy

Spatial distribution of globular clusters in the Galaxy

The Milky Way's satellite galaxies and Globular Clusters (GCs) are known to exhibit an anisotropic spatial distribution. We examine in detail this anisotropy by the means of the inertia tensor. We

Do Halos that Form Early, Have High Concentration, Are Part of a Pair, or Contain a Central Galaxy Potential Host More Pronounced Planes of Satellite Galaxies?

The Milky Way, the Andromeda galaxy, and Centaurus A host flattened distributions of satellite galaxies that exhibit coherent velocity trends indicative of rotation. Comparably extreme satellite

The Leo-I group: new dwarf galaxy and ultra diffuse galaxy candidates

Context. The study of dwarf galaxies and their environments provides crucial test beds for predictions of cosmological models and insights into the structure formation on small cosmological scales.

The Milky Way’s disc of classical satellite galaxies in light of Gaia DR2

We study the correlation of orbital poles of the 11 classical satellite galaxies of the Milky Way, comparing results from previous proper motions with the independent data by Gaia DR2. Previous

The orientation of planes of dwarf galaxies in the quasi-linear Universe

To date at least 10 highly flattened planes of dwarf galaxies are claimed to have been discovered in the Local Universe. The origin of these planes of galaxies remains unknown. One suggestion is

A profile in FIRE: resolving the radial distributions of satellite galaxies in the Local Group with simulations

While many tensions between Local Group (LG) satellite galaxies and Λ cold dark matter cosmology have been alleviated through recent cosmological simulations, the spatial distribution of satellites
...

References

SHOWING 1-10 OF 112 REFERENCES

Co-orbiting satellite galaxy structures are still in conflict with the distribution of primordial dwarf galaxies

Both major galaxies in the Local Group host planar distributions of co-orbiting satellite galaxies, the Vast Polar Structure (VPOS) of the Milky Way and the Great Plane of Andromeda (GPoA). The

On the stability of satellite planes - I. Effects of mass, velocity, halo shape and alignment

The recently discovered vast thin plane of dwarf satellites orbiting the Andromeda Galaxy (M31) adds to the mystery of the small scale distribution of the Local Group's galaxy population. Such well

Velocity anti-correlation of diametrically opposed galaxy satellites in the low-redshift Universe

Measurements of the velocities of pairs of diametrically opposed satellite galaxies suggest that planes of co-rotating satellites, similar to those seen around the Andromeda galaxy, are ubiquitous, and their coherent motion suggests that they represent a substantial repository of angular momentum on scales of about 100 kiloparsecs.

The distribution of satellite galaxies: the great pancake

The 11 known satellite galaxies within 250 kpc of the Milky Way lie close to a great circle on the sky. We use high-resolution N-body simulations of galactic dark matter haloes to test if this

A vast, thin plane of corotating dwarf galaxies orbiting the Andromeda galaxy

Radial velocity measurements reveal that the satellites in this structure have the same sense of rotation about their host, and shows conclusively that substantial numbers of dwarf satellite galaxies share the same dynamical orbital properties and direction of angular momentum.

Are rotating planes of satellite galaxies ubiquitous

We compare the dynamics of satellite galaxies in the Sloan Digital Sky Survey to simple models in order to test the hypothesis that a large fraction of satellites co-rotate in coherent planes. We

A whirling plane of satellite galaxies around Centaurus A challenges cold dark matter cosmology

Analysis of the satellites of the nearby elliptical galaxy Centaurus A found that the satellites are distributed in a planar arrangement, and the members of the plane are orbiting in a coherent direction, which suggests that something is wrong with standard cosmological simulations.

The spatial distribution of the Milky Way and Andromeda satellite galaxies

There are two fundamentally different physical origins of faint satellite galaxies: cosmological sub-structures that contain shining baryons and the fragmentation of gas-rich tidal arms thrown out

A comparison of the distribution of satellite galaxies around Andromeda and the results of ΛCDM simulations

Ibata et al. recently reported the existence of a vast thin plane of dwarf galaxies (VTPD) orbiting around Andromeda. We investigate whether such a configuration can be reproduced within the standard

DID THE MILKY WAY DWARF SATELLITES ENTER THE HALO AS A GROUP?

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
...