{"paper":{"title":"JCMT POL-2 and BISTRO Survey observations of magnetic fields in the L1689 molecular cloud","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Archana Soam, Chakali Eswaraiah, Chang Won Lee, Charles L. H. Hull, Derek Ward-Thompson, Doris Arzoumanian, Doug Johnstone, Florian Kirchschlager, James Di Francesco, Jihye Hwang, Jihyun Kang, Jungmi Kwon, Kate Pattle, Kee-Tae Kim, Lapo Fanciullo, Matt Redman, Mehrnoosh Tahani, Motohide Tamura, Pierre Bastien, Ray S. Furuya, Sarah Sadavoy, Shih-Ping Lai, Simon Coud\\'e, Thiem Hoang, Tie Liu, Tyler L. Bourke, Woojin Kwon, Xindi Tang, Yasuo Doi","submitted_at":"2020-11-19T10:51:49Z","abstract_excerpt":"We present 850$\\mu$m polarization observations of the L1689 molecular cloud, part of the nearby Ophiuchus molecular cloud complex, taken with the POL-2 polarimeter on the James Clerk Maxwell Telescope (JCMT). We observe three regions of L1689: the clump L1689N which houses the IRAS 16293-2422 protostellar system, the starless clump SMM-16, and the starless core L1689B. We use the Davis-Chandrasekhar-Fermi method to estimate plane-of-sky field strengths of $366\\pm 55$ $\\mu$G in L1689N, $284\\pm 34$ $\\mu$G in SMM-16, and $72\\pm 33$ $\\mu$G in L1689B, for our fiducial value of dust opacity. These v"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2011.09765","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/2011.09765/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"}