{"paper":{"title":"The Gaia-ESO Survey: CNO abundances in the open clusters Trumpler 20, NGC 4815, and NGC 6705","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"A. Bragaglia, A. Drazdauskas, A. Recio-Blanco, A. Vallenari, C. Lardo, D. Romano, E. Flaccomio, E. Friel, E. Pancino, E. Puzeras, E. Stonkut\\.e, F. Jim\\'enez-Esteban, G. Barisevi\\v{c}ius, G. Carraro, G. Gilmore, G. Tautvai\\v{s}ien\\.e, L. Magrini, L. Moribelli, M. T. Costado, P. de Laverny, P. Donati, P. Jofr\\'e, R. D. Jeffries, R. Smiljanic, S. G. Sousa, S. Randich, S. Zaggia, T. Bensby, T. Masseron, T. Morel, V. Hill, \\v{S}. Mikolaitis, Y. Chorniy","submitted_at":"2014-11-11T14:35:12Z","abstract_excerpt":"Aim of this work is to determine C, N, and O abundances in stars of Galactic open clusters of the Gaia-ESO survey and to compare the observed abundances with those predicted by current stellar and Galactic evolution models. In this pilot paper, we investigate the first three intermediate-age open clusters. High-resolution spectra, observed with the FLAMES-UVES spectrograph on the ESO VLT telescope, were analysed using a differential model atmosphere method. Abundances of carbon were derived using the C2 band heads at 5135 and 5635.5 {\\AA}. The wavelength interval 6470- 6490 {\\AA}, with CN feat"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1411.2831","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"}