{"paper":{"title":"The Kepler-19 System: A Transiting 2.2 R_Earth Planet and a Second Planet Detected via Transit Timing Variations","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.EP","authors_text":"Christopher Henze, Christopher J. Burke, Christopher K. Middour, Daniel Fabrycky, David Charbonneau, David G. Koch, David R. Ciardi, Eric B. Ford, Francois Fressin, Geoffrey Marcy, Guillermo Torres, Howard Isaacson, Jack J. Lissauer, Jason F. Rowe, Jason H. Steffen, Jean-Michel Desert, Jennifer R. Hall, Jessie L. Christiansen, Jie Li, Jon M. Jenkins, Martin Still, Matthew J. Holman, Michael Endl, Michael R. Haas, Natalie M. Batalha, Sarah Ballard, Sean McCauliff, Stephen T. Bryson, Steven B. Howell, William D. Cochran, William J. Borucki","submitted_at":"2011-09-07T20:00:19Z","abstract_excerpt":"We present the discovery of the Kepler-19 planetary system, which we first identified from a 9.3-day periodic transit signal in the Kepler photometry. From high-resolution spectroscopy of the star, we find a stellar effective temperature Teff=5541 \\pm 60 K, a metallicity [Fe/H]=-0.13 \\pm 0.06, and a surface gravity log(g)=4.59 \\pm 0.10. We combine the estimate of Teff and [Fe/H] with an estimate of the stellar density derived from the photometric light curve to deduce a stellar mass of M_star = 0.936 \\pm 0.040 M_Sun and a stellar radius of R_star = 0.850 \\pm 0.018 R_Sun. We rule out the possib"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1109.1561","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"}