{"paper":{"title":"Nitrogen abundances in Planet-harbouring stars","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"(2) Centro de Astronomia e Astrofisica de Universidade de Lisboa, 3), (3) Observatoire de Geneve, 4), (4) Departamento de Astrofisica, (5) INAF, A. Ecuvillon (1), G. Israelian (1), Italy), M. Mayor (3), N. C. Santos (2, Osservatorio Astrofisico di Arcetri, Portugal, R. J. Garc\\'ia L\\'opez (1, Spain, S. Randich (5) ((1) Instituto de Astrofisica de Canarias, Switzerland, Universidad de La Laguna","submitted_at":"2004-01-20T17:32:24Z","abstract_excerpt":"We present a detailed spectroscopic analysis of nitrogen abundances in 91 solar-type stars, 66 with and 25 without known planetary mass companions. All comparison sample stars and 28 planet hosts were analysed by spectral synthesis of the near-UV NH band at 3360 \\AA observed at high resolution with the VLT/UVES,while the near-IR NI 7468 \\AA was measured in 31 objects. These two abundance indicators are in good agreement. We found that nitrogen abundance scales with that of iron in the metallicity range -0.6 <[Fe/H]< +0.4 with the slope 1.08 \\pm 0.05. Our results show that the bulk of nitrogen "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0401396","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"}