{"paper":{"title":"Detection of non-radial pulsation and faint companion in the symbiotic star CH Cyg","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.IM"],"primary_cat":"astro-ph.SR","authors_text":"(10) University of Massachusetts, (2) University of Michigan, (3) 3 Laboratoire d'Astrophysique de l'Observatoire de Grenoble (LAOG), (4) Jet Propulsion Laboratory, (5) NASA Goddard Space Flight Center, (6) School of Physics, (7) Michelson Science Center, (8) Harvard-Smithsonian Center for Astrophysics, (9) Institut d'Astrophysique Spatiale, Astronomy, Astronomy Department), Astronomy Dept., California Institute of Technology, E. Pedretti (1), F. P. Schloerb (10), J. D. Monnier (2), J-P. Berger (3), M. G. Lacasse (8), N. D. Thureau (1), N. P. Carleton (8) ((1) School of Physics, P. A. Schuller (9), P. G. Tuthill (6), R. Millan-Gabet (7), S. Lacour (3), Sydney University, Universite Paris-Sud, University of St Andrews, W. A. Traub (4), W. C.Danchi (5)","submitted_at":"2009-05-01T16:55:18Z","abstract_excerpt":"We have detected asymmetry in the symbiotic star CH Cyg through the measurement of precision closure-phase with the IONIC beam combiner, at the IOTA interferometer. The position of the asymmetry changes with time and is correlated with the phase of the 2.1-yr period found in the radial velocity measurements for this star. We can model the time-dependent asymmetry either as the orbit of a low-mass companion around the M giant or as an asymmetric, 20% change in brightness across the M giant. We do not detect a change in the size of the star during a 3 year monitoring period neither with respect "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0905.0120","kind":"arxiv","version":2},"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"}