{"paper":{"title":"The Milky Way Halo in Action Space","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"2) ((1) IoA, (2) CMU, Cambridge, G. C. Myeong (1), J.L. Sanders (1), N.W. Evans (1), Pittsburgh), S. Koposov (1, V. Belokurov (1)","submitted_at":"2018-02-09T16:58:55Z","abstract_excerpt":"We analyse the structure of the local stellar halo of the Milky Way using $\\sim$ 60000 stars with full phase space coordinates extracted from the SDSS--{\\it Gaia} catalogue. We display stars in action space as a function of metallicity in a realistic axisymmetric potential for the Milky Way Galaxy. The metal-rich population is more distended towards high radial action $J_R$ as compared to azimuthal or vertical action, $J_\\phi$ or $J_z$. It has a mild prograde rotation $(\\langle v_\\phi \\rangle \\approx 25$ km s$^{-1}$), is radially anisotropic and highly flattened with axis ratio $q \\approx 0.6 "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1802.03351","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"}