{"paper":{"title":"BISTRO Survey: Gravity-Dominated and Magnetically Regulated Star Formation in M17 SW","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"Gravity globally drives star formation in M17 SW while the magnetic field structure regulates it locally.","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Anthony Whitworth, Archana Soam, Chakali Eswaraiah, Chang Won Lee, David Berry, David Eden, Derek Ward-Thompson, Doris Arzoumanian, Doug Johnstone, Felix Priestley, James Di Francesco, Jihye Hwang, Ji-hyun Kang, Jungmi Kwon, Kate Pattle, Kee-Tae Kim, Keping Qiu, Mengke Zhao, Motohide Tamura, Nguyen Bich Ngoc, Pierre Bastien, Ray S. Furuya, Sarah Sadavoy, Shih-Ping Lai, Takashi Onaka, Thiem Hoang, Tyler L. Bourke, Woojin Kwon, Xindi Tang, Zhiwei Chen","submitted_at":"2026-05-18T00:07:32Z","abstract_excerpt":"We present high-resolution magnetic field maps of the M17 SW molecular cloud using JCMT 850 $\\mu$m dust polarization at a scale of 14$''$. The magnetic field exhibits a distinct arc-like structure that encircles three dense clumps (C1, C2, and C3). By combining polarization data with ammonia line observations, the plane-of-sky magnetic field strength, measured using the Skalidis-Tassis method to minimize angle dispersion errors, ranges from 0.1 to 2.4 mG (mean: 0.54 mG). Energy budget analysis reveals a hierarchy dominated by gravity ($e_G \\approx 10^{-7.8}$ erg cm$^{-3}$), which exceeds both "},"claims":{"count":4,"items":[{"kind":"strongest_claim","text":"Star formation in M17 SW is globally driven by gravity but locally regulated by the magnetic field structure.","source":"verdict.strongest_claim","status":"machine_extracted","claim_id":"C1","attestation":"unclaimed"},{"kind":"weakest_assumption","text":"The Skalidis-Tassis method applied to the polarization and ammonia data yields accurate plane-of-sky magnetic field strengths without significant residual errors from angle dispersion or unresolved structure (abstract and implied methods section).","source":"verdict.weakest_assumption","status":"machine_extracted","claim_id":"C2","attestation":"unclaimed"},{"kind":"one_line_summary","text":"High-resolution magnetic field maps of M17 SW reveal gravity-dominated energy budget with magnetic fields regulating collapse and accretion channels in a 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