{"paper":{"title":"The apparent anti-correlation between the mass opacity of interstellar dust and the surface-density of interstellar gas","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"A. P. Whitworth, F. D. Priestley","submitted_at":"2020-02-18T11:00:15Z","abstract_excerpt":"Recent analyses of ${\\it Herschel}$ observations suggest that in nearby disc galaxies the dust mass opacity at $500 \\, {\\rm \\mu m}$, $\\kappa_{500}$, decreases with increasing gas surface density, $\\Sigma_{\\rm ISM}$ (Clark et al. 2019). This apparent anti-correlation between $\\kappa_{500}$ and $\\Sigma_{\\rm ISM}$ is opposite to the behaviour expected from theoretical dust evolution models; in such models, dust in denser, cooler regions (i.e. regions of increased $\\Sigma_{\\rm ISM}$) tends to grow and therefore to have increased $\\kappa_{500}$. We show, using a toy model, that the presence of a ra"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2002.07485","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/2002.07485/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"}