{"paper":{"title":"Discovery and Rossiter-McLaughlin Effect of Exoplanet Kepler-8b","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.EP","authors_text":"Akm Kamal Uddin, Andrew W. Howard, Bill Wohler, Bruce D. Clarke, Christopher Allen, Christopher K. Middour, David G. Koch, David G. Monet, David L. Pletcher, David W. Latham, Debra A. Fischer, Dimitar D. Sasselov, Douglas A. Caldwell, Edward W. Dunham, Elisa V. Quintana, Forrest R. Girouard, Geoffrey W. Marcy, Gibor Basri, Hayley Wu, Hema Chandrasekaran, Howard Isaacson, Jack J. Lissauer, Jason F. Rowe, Jay P. Gunter, Jeffrey Van Cleve, Jennifer R. Hall, Jessie A. Dotson, Jie Li, John Asher Johnson, John C. Geary, Jon M. Jenkins, Joseph D. Twicken, Khadeejah Ibrahim, Lars A. Buchhave, Michael Endl, Michael R. Haas, Michael S. Wu, Miles T. Cote, Natalie M. Batalha, Paresh A. Bhavsar, Peter Tenenbaum, Phillip MacQueen, Ronald L. Gilliland, Sean McCauliff, Soren Meibom, Stephen T. Bryson, Steve B. Howell, Thomas N. Gautier III, Tim M. Brown, Todd C. Klaus, William D. Cochran, William F.Welsh, William J. Borucki","submitted_at":"2010-01-04T20:00:37Z","abstract_excerpt":"We report the discovery and the Rossiter-McLaughlin effect of Kepler-8b, a transiting planet identified by the NASA Kepler Mission. Kepler photometry and Keck-HIRES radial velocities yield the radius and mass of the planet around this F8IV subgiant host star. The planet has a radius RP = 1.419 RJ and a mass, MP = 0.60 MJ, yielding a density of 0.26 g cm^-3, among the lowest density planets known. The orbital period is P = 3.523 days and orbital semima jor axis is 0.0483+0.0006/-0.0012 AU. The star has a large rotational v sin i of 10.5 +/- 0.7 km s^-1 and is relatively faint (V = 13.89 mag), b"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1001.0416","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"}