{"paper":{"title":"Spin-orbit alignment of exoplanet systems: ensemble analysis using asteroseismology","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.EP","authors_text":"A. R. G. Santos, C. Karoff, D. Bossini, D. Huber, D. Stello, G. R. Davies, H. Kjeldsen, J. Christensen-Dalsgaard, J. N. Winn, J. S. Kuszlewicz, M. N. Lund, M. S. Lundkvist, O. Benomar, R. Handberg, S. Albrecht, S. Basu, S. Hekker, T. Hirano, T. L. Campante, T. R. Bedding, T. R. White, T. S. H. North, V. Silva Aguirre, V. Van Eylen, W. J. Chaplin, Y. P. Elsworth","submitted_at":"2016-01-22T15:58:15Z","abstract_excerpt":"The angle $\\psi$ between a planet's orbital axis and the spin axis of its parent star is an important diagnostic of planet formation, migration, and tidal evolution. We seek empirical constraints on $\\psi$ by measuring the stellar inclination $i_{\\rm s}$ via asteroseismology for an ensemble of 25 solar-type hosts observed with NASA's Kepler satellite. Our results for $i_{\\rm s}$ are consistent with alignment at the 2-$\\sigma$ level for all stars in the sample, meaning that the system surrounding the red-giant star Kepler-56 remains as the only unambiguous misaligned multiple-planet system dete"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1601.06052","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"}