{"paper":{"title":"Distortion of Magnetic Fields in a Starless Core IV: Magnetic Field Scaling on Density and Mass-to-flux Ratio Distribution in FeSt 1-457","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Jungmi Kwon, Ken'ichi Tatematsu, Kohji Tomisaka, Masao Saito, Motohide Tamura, Nobuhiko Kusakabe, Ryo Kandori, Takahiro Nagayama, Tetsuya Nagata, Yasushi Nakajima","submitted_at":"2018-08-16T02:21:51Z","abstract_excerpt":"In the present study, the magnetic field scaling on density, $|B| \\propto \\rho^{\\kappa}$, was revealed in a single starless core for the first time. The $\\kappa$ index of $0.78 \\pm 0.10$ was obtained toward the starless dense core FeSt 1-457 based on the analysis of the radial distribution of the polarization angle dispersion of background stars measured at the near-infrared wavelengths. The result prefers $\\kappa = 2/3$ for the case of isotropic contraction, and the difference of the observed value from $\\kappa = 1/2$ is 2.8 sigma. The distribution of the ratio of mass to magnetic flux was ev"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1808.05327","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"}