{"paper":{"title":"The HST large programme on $\\omega$ Centauri - II. internal kinematics","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.GA","authors_text":"(2) INAF-OAPD, (3) UniPD, 4), (4) JHU, (5) Astronomy Dept., (7) UCSD, (8) Australian National University), A. Bellini (1), A. F. Marino (8), A. J. Burgasser (7), A. P. Milone (3), D. Apai (5.6), J. Anderson (1), J. M. Rees (5) ((1) STScI, L. R. Bedin (2), M. Libralato (1), Planetary Obs, R. P. van der Marel (1, The University of Arizona, The University of Arizona (6) Lunar","submitted_at":"2018-01-04T19:00:10Z","abstract_excerpt":"In this second installment of the series, we look at the internal kinematics of the multiple stellar populations of the globular cluster $\\omega$ Centauri in one of the parallel Hubble Space Telescope (HST) fields, located at about 3.5 half-light radii from the center of the cluster. Thanks to the over 15-year-long baseline and the exquisite astrometric precision of the HST cameras, well-measured stars in our proper-motion catalog have errors as low as $\\sim 10\\ \\mu$as yr$^{-1}$, and the catalog itself extends to near the hydrogen-burning limit of the cluster. We show that second-generation (2"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1801.01504","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"}