{"paper":{"title":"Metallicity and Kinematics of the Galactic halo from the LAMOST sample stars","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Cuihua Du, Heidi Jo Newberg, Jun Ma, Shuai Liu, Xu Zhou, Yonghui Hou, Yong Zhang, Yuefei Wang, Yuqin Chen, Zhenyu Wu, Zihuang Cao","submitted_at":"2018-06-27T06:21:23Z","abstract_excerpt":"We study the metallicity distribution and kinematic properties of 4,680 A/F/G/K-type giant stars with $|z|>$ 5 kpc selected from the LAMOST spectroscopic survey. The metallicity distribution of giant stars with 5 $<|z|\\leqslant$ 15 kpc can be described by a three-peak Gaussian model with peaks at [Fe/H] $\\sim-0.6\\pm0.1$, $-1.2\\pm0.3$ and $-2.0\\pm0.2$, corresponding to the ratio of 19$\\%$, 74$\\%$ and 7$\\%$, respectively. The $\\rm{[\\alpha/Fe]}$ is used to associate the three peaks with the thick disk, inner-halo and outer-halo components of the Galaxy. The metallicity distribution of these giant"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1806.10315","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"}