{"paper":{"title":"A Characteristic Scale for Cold Gas","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Ann-Marie Madigan, Michael McCourt, Ryan M. O'Leary, S. Peng Oh","submitted_at":"2016-10-04T20:00:04Z","abstract_excerpt":"We find that clouds of optically-thin, pressure-confined gas are prone to fragmentation as they cool below $\\sim10^6$ K. This fragmentation follows the lengthscale $\\sim{c}_{\\text{s}}\\,t_{\\text{cool}}$, ultimately reaching very small scales ($\\sim{0.1} \\text{pc}/n$) as they reach the temperature $\\sim10^4$ K at which hydrogen recombines. While this lengthscale depends on the ambient pressure confining the clouds, we find that the column density through an individual fragment $N_{\\text{cloudlet}}\\sim10^{17} \\text{cm}^{-3}$ is essentially independent of environment; this column density represent"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1610.01164","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"}