{"paper":{"title":"Two 'b's in the Beehive: The Discovery of the First Hot Jupiters in an Open Cluster","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.EP","authors_text":"(2) Harvard-Smithsonian Center for Astrophysics, (3) Niels Bohr Institute, 4), (4) Centre for Star, (5) W. M. Keck Observatory), A. Bieryla (2), A. H. Szentgyorgyi (2), D. W. Latham (2), G. A. Esquerdo (2), G. F\\\"ur\\'esz (2), G. Torres (2), J. C. Geary (2), J. R. Cantrell (1), L. A. Buchhave (3, M. C. Calkins (2), Natural History Museum of Denmark, P. Berlind (2), Planet Formation, R. J. White (1), R. P. Stefanik (2) ((1) Georgia State University, S. E. Dahm (5), S. N. Quinn (1), University of Copenhagen","submitted_at":"2012-07-03T20:00:14Z","abstract_excerpt":"We present the discovery of two giant planets orbiting stars in Praesepe (also known as the Beehive Cluster). These are the first known hot Jupiters in an open cluster and the only planets known to orbit Sun-like, main-sequence stars in a cluster. The planets are detected from Doppler shifted radial velocities; line bisector spans and activity indices show no correlation with orbital phase, confirming the variations are caused by planetary companions. Pr0201b orbits a V=10.52 late F dwarf with a period of 4.4264 +/- 0.0070 days and has a minimum mass of 0.540 +/- 0.039 Mjup, and Pr0211b orbits"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1207.0818","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"}