{"paper":{"title":"The Small-scale Structures in the Wind of Messier 82","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Brant E. Robertson, D. B. Fisher, Evan E. Schneider, Lee Armus, Lisa J. Kewley, Patrick L. Shopbell, Peixin Zhu, Ralph S. Sutherland, Rosalia O'Brien, Sanchayeeta Borthakur, Sebastian Lopez, Timothy Heckman, Yucheng Guo","submitted_at":"2026-06-09T16:07:57Z","abstract_excerpt":"Small-scale multiphase structure plays a central role in galactic-wind evolution, yet the parsec-scale morphology and excitation of the warm ionised gas remain poorly constrained. We present deep HST narrow-band imaging of the southern wind of Messier 82 (M82) in H$\\alpha$, [OIII], [SII], and [NII], designed to resolve the warm ionised phase on parsec scales. The H$\\alpha$ emission is detected to $\\approx$2.1 kpc above the disk, while the fainter emission lines are detected over smaller radial extents, with [OIII] reaching $\\approx$ 1.5 kpc. We develop a filament-finding pipeline for the H$\\al"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.11036","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/2606.11036/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"}