{"paper":{"title":"Spiral-like star-forming patterns in CALIFA early-type galaxies","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"A. Del Olmo, \\'A. R. L\\'opez-S\\'anchez, B. Ziegler, C. Catal\\'an-Torrecilla, C. J. Walcher, C. Kehrig, D. J. Bomans, F. F. Rosales-Ortega, I. Breda, I. M\\'arquez, J. Bland-Hawthorn, J. Iglesias-P\\'aramo, J. M. Gomes, J. M. V\\'ilchez, L. Galbany, M. D. Lehnert, M. Moll\\'a, P. Papaderos, R. A. Marino, R. Garc\\'ia-Benito, R. M. Gonz\\'alez Delgado, S. F. S\\'anchez, S. N. dos Reis, the CALIFA collaboration","submitted_at":"2015-11-02T23:43:49Z","abstract_excerpt":"Based on a combined analysis of SDSS imaging and CALIFA integral field spectroscopy data, we report on the detection of faint (24 < {\\mu}$_r$ mag/arcsec$^2$ < 26) star-forming spiral-arm-like features in the periphery of three nearby early-type galaxies (ETGs). These features are of considerable interest because they document the still ongoing inside-out growth of some local ETGs and may add valuable observational insight into the origin and evolution of spiral structure in triaxial stellar systems. A characteristic property of the nebular component in the studied ETGs, classified i+, is a two"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1511.00744","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":""},"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"}