{"paper":{"title":"Evolution and Impact of Bars over the Last Eight Billion Years: Early Results from GEMS","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"A. Borch, B. Haussler, B. Mobasher, C. Conselice, C. Heymans, 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","submitted_at":"2004-08-14T01:44:35Z","abstract_excerpt":"Bars drive the dynamical evolution of disk galaxies by redistributing mass and angular momentum, and they are ubiquitous in present-day spirals. Early studies of the Hubble Deep Field reported a dramatic decline in the rest-frame optical bar fraction f_opt to below 5% at redshifts z>0.7, implying that disks at these epochs are fundamentally different from present-day spirals. The GEMS bar project, based on ~8300 galaxies with HST-based morphologies and accurate redshifts over the range 0.2-1.1, aims at constraining the evolution and impact of bars over the last 8 Gyr. We present early results "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0408267","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"}