{"paper":{"title":"K2-139 b: a low-mass warm Jupiter on a 29-day orbit transiting an active K0 V star","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.EP","authors_text":"A. Erikson, A. M. S. Smith, A. P. Hatzes, C. Eiroa, C. M. Persson, D. Gandolfi, D. Lorenzo-Oliveira, D. Nespral, E. Guenther, F. Cusano, H. J. Deeg, H. Rauer, I. Rebollido, J. Cabrera, J. Korth, J. Prieto-Arranz, J. Saario, L. Fossati, L. Mancini, M. C. V. Fridlund, M. Endl, M. P\\\"atzold, O. Barrag\\'an, O.V. Zakhozhay, P. Donati, Ph. Eigm\\\"uller, S. Grziwa, S. S. Brems, Sz. Csizmadia, W. D. Cochran","submitted_at":"2017-02-02T14:19:35Z","abstract_excerpt":"We announce the discovery of K2-139 b (EPIC 218916923 b), a transiting warm-Jupiter ($T_\\mathrm{eq}$=547$\\pm$25 K) on a 29-day orbit around an active (log $R^\\prime_\\mathrm{HK}$ = $-$4.46 $\\pm$ 0.06) K0 V star in K2 Campaign 7. We derive the system's parameters by combining the K2 photometry with ground-based follow-up observations. With a mass of~$0.387 _{ - 0.075 } ^ {+ 0.083 } M_{\\rm J}$ and radius of $0.808 _{ - 0.033 } ^ {+ 0.034 } R_{\\rm J}$, K2-139 b is one of the transiting warm Jupiters with the lowest mass known to date. The planetary mean density of $0.91 _{ - 0.20} ^ { + 0.24 }$ $\\"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1702.00691","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"}