{
  "id": "1709.08633",
  "version": "v1",
  "published": "2017-09-25T18:00:01.000Z",
  "updated": "2017-09-25T18:00:01.000Z",
  "title": "Cresting the wave: Proper motions of the Eastern Banded Structure",
  "authors": [
    "Alis J. Deason",
    "Vasily Belokurov",
    "Sergey E. Koposov"
  ],
  "comment": "5 pages, 5 figures. MNRAS Letters accepted",
  "categories": [
    "astro-ph.GA"
  ],
  "abstract": "We study the kinematic properties of the Eastern Banded Structure (EBS) and Hydra I overdensity using exquisite proper motions derived from the Sloan Digital Sky Survey (SDSS) and Gaia source catalog. Main sequence turn-off stars in the vicinity of the EBS are identified from SDSS photometry; we use the proper motions and, where applicable, spectroscopic measurements of these stars to probe the kinematics of this apparent stream. We find that the EBS and Hydra I share common kinematic and chemical properties with the nearby Monoceros Ring. In particular, the proper motions of the EBS, like Monoceros, are indicative of prograde rotation (V_phi ~ 180-220 km/s), which is similar to the Galactic thick disc. The kinematic structure of stars in the vicinity of the EBS suggest that it is not a distinct stellar stream, but rather marks the \"edge\" of the Monoceros Ring. The EBS and Hydra I are the latest substructures to be linked with Monoceros, leaving the Galactic anti-centre a mess of interlinked overdensities which likely share a unified, Galactic disc origin.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2017-09-25T18:00:01.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "eastern banded structure",
      "sloan digital sky survey",
      "main sequence turn-off stars",
      "gaia source catalog",
      "exquisite proper motions"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 5,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}