{"paper":{"title":"Galactic Rotation from Cepheids with Gaia DR2 and Effects of Non-Axisymmetry","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"(2) Toronto, (3) Tokyo, (4) NAOJ), Daisuke Kawata (1), Jo Bovy (2), Junichi Baba (4) ((1) MSSL, Noriyuki Matsunaga (3), UCL","submitted_at":"2018-03-15T18:04:16Z","abstract_excerpt":"We apply a simple axisymmetric disc model to 218 Galactic Cepheids whose accurate measurements of the distance and velocities are obtained by cross-matching an existing Cepheids catalogue with the Gaia DR2 data. Our model fit determines the \"local centrifugal speed\", $V_\\mathrm{c}$ $-$ defined as the rotation speed required to balance the local radial gravitational force $-$ at the Sun's location to be $V_{c}(R_0)=236\\pm 3$ km s$^{-1}$ and the Sun's azimuthal and radial peculiar motions to be $V_{\\odot}=12.4\\pm0.7$ km s$^{-1}$ and $U_{\\odot}=7.7\\pm0.9$ km s$^{-1}$, respectively. These results "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1803.05927","kind":"arxiv","version":4},"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"}