{"paper":{"title":"The Mid-Infrared Spectrum of Star-Forming Galaxies: Global Properties of PAH Emission","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"A. Li, B. A. Buckalew, B. T. Draine, D. A. Dale, D. Calzetti C. W. Engelbracht, D. J. Hollenbach, E. J. Murphy, F. Walter, G. Helou, G. J. Bendo, H. Roussel, J. D. T. Smith, J. Moustakas, Jr., K. D. Gordon, K. Sheth, L. Armus, R. C. Kennicutt, S. Malhotra","submitted_at":"2006-10-30T21:41:36Z","abstract_excerpt":"We present a sample of low-resolution 5-38um Spitzer IRS spectra of the inner few square kiloparsecs of 59 nearby galaxies spanning a large range of star formation properties. A robust method for decomposing mid-infrared galaxy spectra is described, and used to explore the behavior of PAH emission and the prevalence of silicate dust extinction. Evidence for silicate extinction is found in ~1/8 of the sample, at strengths which indicate most normal galaxies undergo A_V < ~3 magnitudes averaged over their centers. The contribution of PAH emission to the total infrared power is found to peak near"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0610913","kind":"arxiv","version":3},"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"}