The Great disk of Milky Way satellites and cosmological sub-structures

By Pavel Kroupa, C. Theis, C. Boily. 2004

304 citations recorded by the source corpus.

We show that the shape of the observed distribution of Milky Way (MW) satellites is inconsistent with their being drawn from a cosmological sub-structure population with a confidence of 99.5 per cent. Most of the MW satellites therefore cannot be related to dark-matter dominated satellites.

Subfields: Astronomy and Astrophysics, Atomic and Molecular Physics, and Optics, Instrumentation

View Paper: https://www.semanticscholar.org/paper/580563755c2eedd4f2217b1631e0ed64f09294ef

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Citations in the corpus

Small Dwarf Galaxies within Larger Dwarfs: Why Some Are Luminous while Most Go Dark (2008, methodology): “The proper motion of the SMC implies a velocity relative to the LMC of∼ 80 km s−1 at a separation of 23 kpc (Kallivayalil et al. 2006b).”
PRE-REIONIZATION FOSSILS, ULTRA-FAINT DWARFS, AND THE MISSING GALACTIC SATELLITE PROBLEM (2008, background): “However, bright satellites of the Milky Way are distributed very anisotropically (Kroupa et al. 2005; Zentner et al. 2005), so the assumption of isotropy may not be a good one.”
The distribution of satellite galaxies: the great pancake (2005, methodology): “For the purpose of comparing with the analysis of Kroupa et al. (2005), we select the 11 most luminous satellites in each halo within a distance of 250 kpc from the central galaxy.”
The Orbital Poles of Milky Way Satellite Galaxies: A Rotationally Supported Disk of Satellites (2008, background): “The spatial distribution of theMWsatellites has been shown to be highly anisotropic: the satellite galaxies are arranged in a disklike structure, lying almost perpendicular to the Milky Way’s disk (Kunkel & Demers1976; Lynden-Bell 1976, 1982; Hartwick 2000; Kroupa et al. 2005; Metz et al. 2007).”
Galaxies as simple dynamical systems: observational data disfavor dark matter and stochastic star formation (2014, background): “This recent contribution does not address the question posed originally by [170] why the satellites of the MW and Andromeda are in thin planes while the host dark matter halos are spheroidal.”
BEASTS OF THE SOUTHERN WILD: DISCOVERY OF NINE ULTRA FAINT SATELLITES IN THE VICINITY OF THE MAGELLANIC CLOUDS (2015, methodology): “Kroupa et al. (2005) developed this picture, adding more Milky Way satellites to the Great Magellanic family.”
Galaxy Alignments: Observations and Impact on Cosmology (2015, result): “Contrary to the results for field galaxies, there is evidence of a strong Holmberg effect for Milky Way satellites (e.g. Lynden-Bell 1976; Kunkel & Demers 1976; Kroupa et al. 2005; Pawlowski & Kroupa 2013).”
Small scale problems of the $\Lambda$CDM model: a short review (2016, background): “, [46]), this should be considered as a strong challenge for the ΛCDM model1.”
The spatial distribution of the Milky Way and Andromeda satellite galaxies (2006, methodology): “In previous works (Hartwick 2000; Kroupa et al. 2005; Kang et al. 2005; Libeskind et al. 2005; Zentner et al. 2005; Koch & Grebel 2006) the planarity of the satellite distribution was quantified based on the ‘thickness’ of the distribution in relation to some measure of the total spatial extent:…”
The current status of galaxy formation (2012, background): “The distribution of the MW satellite galaxies in a great circle (Lynden-Bell, 1982) is unexpected in the ΛCDM context (Kroupa et al., 2005).”
Co-orbiting satellite galaxy structures are still in conflict with the distribution of primordial dwarf galaxies (2014, background): “…1 The feature which we call the VPOS is called the ’Magellanic plane’ by Kunkel & Demers (1976) and Lynden-Bell (1976); the ’great pancake’ by Libeskind et al. (2005), Li & Helmi (2008) and Wang et al. (2013); and the disc of satellites by Kroupa et al. (2005) and Metz et al. (2008).”
Hundreds of Milky Way Satellites? Luminosity Bias in the Satellite Luminosity Function (2008, background): “…in the literature concerning whether satellite galaxies are preferentially oriented (either parallel or perpendicular) with respect to galaxy disks (Kroupa et al. 2005; Metz et al. 2007; Kuhlen et al. 2007; Wang et al. 2008; Faltenbacher et al. 2008) and equally contradictory claims regarding how…”
THE INVISIBLES: A DETECTION ALGORITHM TO TRACE THE FAINTEST MILKY WAY SATELLITES (2008, background): “Studies of the spatial distributions of Milky Way and M31 dwarf galaxy companions have also highlighted possible discrepancies between ΛCDM theory and observations (Kroupa et al. 2005; Kang et al. 2005; Metz et al. 2007).”