{"paper":{"title":"The Green Bank Ammonia Survey: Observations of Hierarchical Dense Gas Structures in Cepheus-L1251","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.GA","authors_text":"Adam Ginsburg, Alyssa A. Goodman, Ana Chac\\'on-Tanarro, Anna Punanova, Ayushi Singh, Christopher D. Matzner, Elena Redaelli, Erik Rosolowsky, Felipe Alves, Hector G. Arce, Helen Kirk, How-Huan Chen, Jaime E. Pineda, James Di Francesco, Jared Keown, Michael Chun-Yuan Chen, Paola Caselli, Peter Martin, Philip C. Myers, Rachel K. Friesen, Stella S. R. Offner, Yancy Shirley, Young Min Seo","submitted_at":"2017-10-13T02:42:12Z","abstract_excerpt":"We use Green Bank Ammonia Survey observations of NH$_3$ (1,1) and (2,2) emission with 32'' FWHM resolution from a ~ 10 pc$^{2}$ portion of the Cepheus-L1251 molecular cloud to identify hierarchical dense gas structures. Our dendrogram analysis of the NH$_3$ data results in 22 top-level structures, which reside within 13 lower-level, parent structures. The structures are compact (0.01 pc $\\lesssim R_{eff} \\lesssim$ 0.1 pc) and are spatially correlated with the highest H$_2$ column density portions of the cloud. We also compare the ammonia data to a catalog of dense cores identified by higher-re"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1710.04785","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"}