{"paper":{"title":"Temporal 1/f^\\alpha Fluctuations from Fractal Magnetic Fields in Black Hole Accretion Flow","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"K. Shibata (Kwasan Observatory), M. Machida, R. Matsumoto (Chiba Univ.), S. Mineshige (Kyoto Univ.), T. Kawaguchi","submitted_at":"1999-12-24T08:30:13Z","abstract_excerpt":"Rapid fluctuation with a frequency dependence of $1/f^{\\alpha}$ (with $\\alpha \\simeq 1 - 2$) is characteristic of radiation from black-hole objects. Its origin remains poorly understood. We examine the three-dimensional magnetohydrodynamical (MHD) simulation data, finding that a magnetized accretion disk exhibits both $1/f^\\alpha$ fluctuation (with $\\alpha \\simeq 2$) and a fractal magnetic structure (with the fractal dimension of $D \\sim 1.9$). The fractal field configuration leads reconnection events with a variety of released energy and of duration, thereby producing $1/f^\\alpha$ fluctuation"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9912510","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"}