{"paper":{"title":"Kinematics of the stellar halo and the mass distribution of the Milky Way using BHB stars","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.GA","authors_text":"Geraint F. Lewis, Joss Bland-Hawthorn, Prajwal R. Kafle, Sanjib Sharma","submitted_at":"2012-10-29T00:14:59Z","abstract_excerpt":"Here we present a kinematic study of the Galactic halo out to a radius of $\\sim$ 60 kpc, using 4664 blue horizontal branch (BHB) stars selected from the SDSS/SEGUE survey, to determine key dynamical properties. Using a maximum likelihood analysis, we determine the velocity dispersion profiles in spherical coordinates ($\\sigma_{r}$, $\\sigma_{\\theta}$, $\\sigma_{\\phi}$) and the anisotropy profile ($\\beta$). The radial velocity dispersion profile ($\\sigma_{r}$) is measured out to a galactocentric radius of $r \\sim 60$ kpc, but due to the lack of proper-motion information, $\\sigma_{\\theta}$, $\\sigm"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1210.7527","kind":"arxiv","version":1},"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"}