{"paper":{"title":"KELT-18b: Puffy Planet, Hot Host, Probably Perturbed","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.EP","authors_text":"Akihiko Fukui, Allyson Bieryla, Andrew Baldridge, Andrew W. Howard, Benjamin J. Fulton, Bethany Tirrell, B. Scott Gaudi, Casey Melton, Chris Stockdale, Daniel J. Stevens, David H. Cohen, David W. Latham, Denise C. Stephens, D. L. DePoy, Eliza M.-R. Kempton, Eric L. N. Jensen, Gaetano Scarpetta, Gilbert A. Esquerdo, G. Zhou, Howard Isaacson, Howard Relles, Ivan A. Curtis, Jason D. Eastman, Jennifer L. Marshall, Joao Gregorio, John F. Kielkopf, Jonathan Labadie-Bartz, Joseph E. Rodriguez, Joshua Pepper, Kaloyan Penev, Karen A. Collins, Keivan G. Stassun, Kim K. McLeod, Knicole D. Col\\'on, Lauren M. Weiss, Mark Manner, Mark Trueblood, Matthew T. Penny, Michael B. Lund, Michael D. Joner, Michael L. Calkins, Norio Narita, \\\"Ozg\\\"ur Ba\\c{s}t\\\"urk, Patricia Trueblood, Perry Berlind, Phillip A. Reed, Richard W. Pogge, Robert J. Siverd, Roberto Zambelli, Ryan J. Oelkers, Ryu Tsuguru, T.G. Tan, Thomas E. Oberst, Thomas G. Beatty, Tiffany Visgaitis, Y. Sunny Zhao","submitted_at":"2017-02-06T15:33:42Z","abstract_excerpt":"We report the discovery of KELT-18b, a transiting hot Jupiter in a 2.87d orbit around the bright (V=10.1), hot, F4V star BD+60 1538 (TYC 3865-1173-1). We present follow-up photometry, spectroscopy, and adaptive optics imaging that allow a detailed characterization of the system. Our preferred model fits yield a host stellar temperature of 6670+/-120 K and a mass of 1.524+/-0.069 Msun, situating it as one of only a handful of known transiting planets with hosts that are as hot, massive, and bright. The planet has a mass of 1.18+/-0.11 Mjup, a radius of 1.57+/-0.04 Rjup, and a density of 0.377+/"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1702.01657","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"}