{"paper":{"title":"X-ray spectroscopy of the unsteady quiescent corona of AD Leo with Chandra","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"(2) Smithsonian Astrophysical Observatory, (3) Dipartimento Scienze Fisiche ed Astronomiche Universita' di Palermo, A. Maggio (1), Cambridge MA, F.R. Harnden, G. Micela (1), G. Peres (3), Italy, Italy), J.J. Drake (2), Jr. (2), S. Sciortino (1) ((1) INAF - Osservatorio Astronomico di Palermo, USA, V. Kashyap (2)","submitted_at":"2004-05-28T14:35:52Z","abstract_excerpt":"We present the analysis and interpretation of an observation of the flare star AD Leo (dM3e) with Chandra/LETG. The high resolution X-ray spectrum allowed us to infer the plasma emission measure distribution (EMD) vs. temperature, and the abundances of individual elements in the corona of this magnetically-active star, during a typical state characterized by significant variability but no large flaring event. We have also measured plasma densities at various temperatures using spectroscopic diagnostics provided by He-like triplets and Fe XXI lines. We show that the present EMD is similar to th"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0405580","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"}