{"paper":{"title":"exoALMA XIV. Gas Surface Densities in the RX J1604.3-2130 A Disk from Pressure-broadened CO Line Wings","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.EP","authors_text":"Andr\\'es F. Izquierdo, Andrew J. Winter, Brianna Zawadzki, Cassandra Hall, Christophe Pinte, Cristiano Longarini, Daniele Fasano, Daniel J. Price, David J. Wilner, Gaylor Wafflard-Fernandez, Geoffroy Lesur, Gianni Cataldi, Giovanni Rosotti, Himanshi Garg, Hsi-Wei Yen, Jaehan Bae, Jane Huang, Jochen Stadler, John D. Ilee, Kazuhiro Kanagawa, Lisa W\\\"olfer, Marcelo Barraza-Alfaro, Maria Galloway-Sprietsma, Mario Flock, Misato Fukagawa, Munetake Momose, Myriam Benisty, Pietro Curone, Richard Teague, Ryan A. Loomis, Ryuta Orihara, Sean M. Andrews, Stefano Facchini, Tomohiro C. Yoshida","submitted_at":"2025-04-28T02:44:18Z","abstract_excerpt":"The gas surface density is one of the most relevant physical quantities in protoplanetary disks. However, its precise measurement remains highly challenging due to the lack of a direct tracer. In this study, we report the spatially-resolved detection of pressure-broadened line wings in the CO $J=3-2$ line in the RX J1604.3-2130 A transition disk as part of the exoALMA large program. Since pressure-broadened line wings are sensitive to the total gas volume density, we robustly constrain the radial dependence of the gas surface density and midplane pressure in the region located $50-110$ au from"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2504.19434","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/2504.19434/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"}