{"paper":{"title":"ATOMS: ALMA Three-millimeter Observations of Massive Star-forming regions -XIV. Properties of resolved UC Hii regions","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Anandmayee Tej, Archana Soam, Chang Won Lee, C. Zhang, D. Li, Feng-Yao Zhu, Guido Garay, H. -L. Liu, J. -W. Wu, J. -W. Zhou, Ke Wang, K. Tatematsu, Leonardo Bronfman, Shanghuo Li, Tie Liu, W. F. Xu, Y. Zhang, Z. -Y. Ren","submitted_at":"2023-01-05T02:21:35Z","abstract_excerpt":"Hydrogen recombination lines (RRLs) are one of the major diagnostics of the physical properties of H{\\sc ii} regions. We use RRL H40$\\alpha$, He40$\\alpha$ and 3 mm continuum emission to investigate the properties of a large sample of resolved UC H{\\sc ii} regions identified in the ATOMS survey. In total, we identify 94 UC H{\\sc ii} regions from H40$\\alpha$ emission. The basic parameters for these UC H{\\sc ii} regions such as electron density, emission measure, electron temperature, ionic abundance ratio (n$_{\\rm He^+}$/n$_{\\rm H^+}$), and line width are derived. The median electron density and"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2301.01876","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2301.01876/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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"}