{
  "annotation_id": "b16cb293-838d-4ba1-b0a7-f6fa69a560f0",
  "date_created": "2026-02-17T05:53:04.670000Z",
  "date_modified": "2026-02-17T05:53:04.670000Z",
  "file_hash": "3ee940e317c00a501503c7a24fa0f33ce4895ec3d874e4403b5a467bd21dd496",
  "private": false,
  "record": {
    "abstract": "The recent microcalorimetric X-ray observations of the Coma cluster by XRISM have sparked active discussion regarding the physical origin of its gas velocity features. Here, we demonstrate that an off-axis minor merger in its early phase $-$ when the infalling subhalo is near its primary apocenter and the stripped tail is not yet mixed with the main cluster atmosphere $-$ can drive intracluster gas motions generally consistent with the XRISM results. These include a pronounced velocity gradient and an approximately uniform velocity dispersion of $\\simeq100-200\\,\\rm{km\\,s^{-1}}$ in the cluster core. Our merger scenario was originally suggested in Lyskova et al. (2019) to reproduce the major X-ray morphological features of Coma. In addition, we introduce a simple and robust diagnostic of intracluster gas motions based on the ratio of the line-of-sight velocity to the velocity dispersion.",
    "arxiv_id": "2601.05803",
    "authors": [
      "Congyao Zhang",
      "Eugene Churazov",
      "Ildar Khabibullin",
      "Natalya Lyskova",
      "Norbert Werner",
      "Irina Zhuravleva"
    ],
    "categories": [
      "astro-ph.HE",
      "astro-ph.GA"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "title": "A Minimalist Merger Interpretation of XRISM\u0027s Gas Velocity Measurements in the Coma Cluster",
    "url": "https://arxiv.org/abs/2601.05803",
    "version": "v1"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "e5adb065-e061-4bc6-8b7b-7dbc1bd16893",
    "id": "arXiv Dataset",
    "type": "Model",
    "variant": "snapshot-2026-01-17",
    "version": "0.1.0"
  },
  "user_id": 1000002
}