A New Rarity Assessment of the `Disk of Satellites': the Milky Way System Is the Exception Rather than the Rule in the $\Lambda$CDM Cosmology

Chanoul Seo, Suk-Jin Yoon, Sanjaya Paudel +2

The majority of satellite galaxies around the Milky Way (MW) show disk-like distributions (the disk of satellites; DoS), which is a small-scale problem of the $\Lambda$CDM cosmology. The…