{"paper":{"title":"Detection of high-velocity material from the wind-wind collision zone of Eta Carinae across the 2009.0 periastron passage","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"Atsuo T. Okazaki (Hokkai-Gakuen U), Augusto Damineli (IAG/U Sao Paulo), Dieter Schertl (MPIFR), D. J. Hillier (U Pittsburgh), Florentin Millour (MPIFR), Florian Kerber (ESO), Gerd Weigelt (MPIFR), Henrik Hartman (Lund U), Jose H. Groh (MPI for Radioastronomy), Karl-Heinz Hofmann (MPIFR), Koji Murakawa (MPIFR), Krister E. Nielsen (NASA/GSFC & CUA), Mairan Teodoro (IAG/U Sao Paulo), Stan P. Owocki (U Delaware), Stefan Kraus (U Michigan), Theodore R. Gull (NASA/GSFC), Thomas Driebe (MPIFR), Thomas I. Madura (U Delaware)","submitted_at":"2010-03-23T21:08:45Z","abstract_excerpt":"We report near-IR spectroscopic observations of the Eta Carinae massive binary system during 2008-2009 using VLT/CRIRES. We detect a strong, broad absorption wing in He I 10833 extending up to -1900 km/s across the 2009.0 spectroscopic event. Archival HST/STIS ultraviolet and optical data shows a similar high-velocity absorption (up to -2100 km/s) in the UV resonance lines of Si IV 1394, 1403 across the 2003.5 event. UV lines from low-ionization species,  such as Si II 1527, 1533 and C II 1334, 1335, show absorption up to -1200 km/s, indicating that the absorption with v from -1200 to -2100 km"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1003.4527","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"}