{"paper":{"title":"Bar Evolution Over the Last Eight Billion Years: A Constant Fraction of Strong Bars in GEMS","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"A. Borch, B. Haussler, B. Mobasher, C. Heymans, C. J. Conselice, C. Wolf, C. Y. Peng, D. H. McIntosh, E. F. Bell, F. D. Barazza, G. M. Lubell, H.-W. Rix, I. Heyer, I. Shlosman, J. A. R. Caldwell, J. Davies, J. H. Knapen, K. Jahnke, K. Meisenheimer, L. Wisotzki, M. Barden, R. S. Somerville, S. F. Sanchez, S. Jogee, S. Laine, S. Ravindranath, S. V.W. Beckwith, T. Dahlen","submitted_at":"2004-08-20T20:35:50Z","abstract_excerpt":"One third of present-day spirals host optically visible strong bars that drive their dynamical evolution. However, the fundamental question of how bars evolve over cosmological times has yet to be addressed, and even the frequency of bars at intermediate redshifts remains controversial. We investigate the frequency of bars out to z~1.0 drawing on a sample of 1590 galaxies from the GEMS survey, which provides morphologies from HST ACS two-color images, and highly accurate redshifts from the COMBO-17 survey. We identify spiral galaxies using the Sersic index, concentration parameter, and rest-fr"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0408382","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/astro-ph/0408382/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"}