{"paper":{"title":"The peculiar velocities in the Galactic outer disk--hints of the elliptical disk and the perturbation of the spiral structures","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Chao Liu, Hai-Jun Tian, Jun-Chen Wan, Li-Cai Deng, Yong-Heng Zhao, Yong-Hui Hou, Yong Zhang, Yue-Fei Wang, Yue Wu, Zi-Huang Cao","submitted_at":"2016-03-20T20:00:01Z","abstract_excerpt":"We present the peculiar in-plane velocities derived from the LAMOST red clump stars. From the variations of the in-plane velocity with the Galactocentric radius for the young and old red clump stars, we are able to identify two types of peculiar velocities: 1) both the two red clump populations show that the radial velocity is negative within $R=9.0$\\,kpc and becomes positive beyond (denoted as the \\emph{long-wave} mode); and 2) the young red clump stars show larger mean radial velocity than the old population by about 3\\,km$\\rm s^{-1}$ between $R=9$ and 12\\,kpc (denoted as the \\emph{short-wav"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1603.06262","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"}