{"paper":{"title":"Variations in the 3.3 ${\\mu}$m Polycyclic Aromatic Hydrocarbon Feature Across Nearby Galaxies Driven by Metallicity and Radiation Field Spectrum","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Adam K. Leroy, Alberto Bolatto, Benjamin W. Stadel, Dalya Baron, Daniel A. Dale, David A. Thilker, Debosmita Pathak, Elias K. Oakes, Enrico Congiu, Erik Rosolowsky, Hannah B. Koziol, Hsi-An Pan, Hwihyun Kim, Ismael Pessa, J\\'er\\'emy Chastenet, Jessica Sutter, Jiayi Sun, Justus Neumann, Karin Sandstrom, Kirsten L. Larson, Leonardo \\'Ubeda, Lindsey Hands, Mansi Padave, M\\'ed\\'eric Boquien, Oleg V. Egorov, Ralf S. Klessen, Ryan Chown, Simon C. O. Glover, Sumit K. Sarbadhicary, Thomas G. Williams, Tony D. Weinbeck, Yixian Cao","submitted_at":"2026-08-05T18:00:02Z","abstract_excerpt":"We use JWST NIRCam imaging to investigate the 3.3 ${\\mu}$m polycyclic aromatic hydrocarbon (PAH) feature in nearby galaxies. NIRCam observations of the 3.3 ${\\mu}$m feature are emerging as a powerful tool for studying the structure of the interstellar medium (ISM) and the conditions of the dust at ~0\".1 resolution. These maps require accurate subtraction of the underlying continuum emission. We present an empirical method to isolate the PAH-correlated emission in the F335M filter using the F300M and F360M filters for continuum subtraction. We find that the slope of the F335M/F300M versus F360M"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2608.05286","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/2608.05286/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"}