{"paper":{"title":"ALMA-IMF XIV: Free-Free Templates Derived from H$41\\alpha$ and Ionized Gas Content in Fifteen Massive Protoclusters","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.GA","authors_text":"Adam Ginsburg, Allison P. M. Towner, Amelia M. Stutz, Anthony P. Whitworth, Antoine Gusdorf, Atanu Koley, Daniel J. D\\'iaz-Gonz\\'alez, Fabien Louvet, Fr\\'ed\\'erique Motte, Friedrich Wyrowski, Hong-Li Liu, Javiera Salinas, Jonathan Braine, Karl M. Menten, Leonardo Bronfman, Manuel Fern\\'andez-L\\'opez, M\\'elanie Armante, M\\'elisse Bonfand, Nichol Cunningham, Patricio Sanhueza, Pierre Dell'Ova, Roberto Galv\\'an-Madrid, Rodrigo H. \\'Alvarez-Guti\\'errez, Rudy Rivera-Soto, Sylvain Bontemps, Tapas Baug, Thomas Nony, Timea Csengeri","submitted_at":"2024-07-10T04:33:17Z","abstract_excerpt":"We use the H$41\\alpha$ recombination line to create templates of the millimeter free-free emission in the ALMA-IMF continuum maps, which allows to separate it from dust emission. This method complements spectral-index information and extrapolation from centimeter wavelength maps. We use the derived maps to estimate the properties of up to 34 HII regions across the ALMA-IMF protoclusters. The hydrogen ionizing-photon rate $Q_0$ and spectral types follow the evolutionary trend proposed by Motte et al. The youngest protoclusters lack detectable ionized gas, followed by protoclusters with increasi"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2407.07359","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/2407.07359/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"}