{"paper":{"title":"The Herschel Exploitation of Local Galaxy Andromeda (HELGA) II: Dust and Gas in Andromeda","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.CO","authors_text":"A. Boselli, A. R. Cooray, B. O'Halloran, B. Schulz, C. D. Wilson, D. L. Clements, E. Mentuch, G. Gentile, G. J. Bendo, G. P. Ford, H. L. Gomez, I. De Looze, J. A. D. L Blommaert, J. Fritz, J. Kirk, J. Roman Duval, J. Verstappen, K. D. Gordon, L. Cortese, L. Spinoglio, M. Baes, M. Boquien, M. J. Page, M. W. L. Smith, R. Braun, S. A. Eales, S. Madden, V. Lebouteiller, W. K. Gear","submitted_at":"2012-04-03T20:00:00Z","abstract_excerpt":"We present an analysis of the dust and gas in Andromeda, using Herschel images sampling the entire far-infrared peak. We fit a modified-blackbody model to ~4000 quasi-independent pixels with spatial resolution of ~140pc and find that a variable dust-emissivity index (beta) is required to fit the data. We find no significant long-wavelength excess above this model suggesting there is no cold dust component. We show that the gas-to-dust ratio varies radially, increasing from ~20 in the center to ~70 in the star-forming ring at 10kpc, consistent with the metallicity gradient. In the 10kpc ring th"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1204.0785","kind":"arxiv","version":2},"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"}