{"paper":{"title":"First Results from the CHARA Array. III. Oblateness, Rotational Velocity and Gravity Darkening of Alderamin","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"A.F. Boden, D. H. Berger, D. R. Ciardi, G. T. van Belle, H. A. McAlister, J. Coyne, J. Sturmann, L. Sturmann, N. Turner, P. J. Goldfinger, R. R. Thompson, S. T. Ridgway, T. ten Brummelaar","submitted_at":"2005-09-27T22:21:52Z","abstract_excerpt":"We present observations of the A7IV-V star Alderamin ($\\alpha$ Cep, HR 8162, HD 203280) from the Georgia State University CHARA Array. These infrared interferometric angular size measurements indicate a non-circular projected disk brightness distribution for this known rapid rotator. The interferometric observations are modeled as arising from an elongated rigid atmosphere, with apparent polar and equatorial radii of $r_p=0.6753^{+0.0119}_{-0.0135}$ milliarcseconds (mas) and $r_e=0.8767^{+0.0293}_{-0.0183}$ mas, respectively, for a difference of $201\\pm 32$ microarcseconds ($\\mu$as), and with "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0509827","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"}