{"paper":{"title":"Discovery of Tidal Tails in Disrupting Open Clusters: Coma Berenices and a Neighbor Stellar Group","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.GA","authors_text":"Andreas Just, Bekdaulet Shukirgaliyev, Bertrand Goldman, Chien-Cheng Lin, Jongsuk Hong, Shih-Yun Tang, W. P. Chen, Xiaoying Pang, Zhen Yuan","submitted_at":"2019-02-04T19:00:01Z","abstract_excerpt":"We report the discovery of tidal structures around the intermediate-aged ($\\sim$ 700--800~Myr), nearby ($\\sim85$~pc) star cluster Coma Berenices. The spatial and kinematic grouping of stars is determined with the {\\it Gaia} DR2 parallax and proper motion data, by a clustering analysis tool, \\textsc{StarGO}, to map 5D parameters ($X, Y, Z$, $\\mu_\\alpha \\cos\\delta, \\mu_\\delta$) onto a 2D neural network. A leading and a trailing tails, each with an extension of $\\sim50$~pc are revealed for the first time around this disrupting star cluster. The cluster members, totaling to $\\sim115^{+5}_{-3}\\,\\rm"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1902.01404","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}