{"paper":{"title":"HARPS-N Solar Radial-Velocity Variations Are Dominated By Large, Bright Magnetic Regions","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"10025 Pino Torinese, (10) Astrophysics Group, 11), (11) Department of Astronomy & Astrophysics, (12) Astrophysics Research Centre, (13) INAF-Fundacion Galileo Galilei, 14), (14) INAF-Osservatorio Astronomico Di Cagliari, (15) SUPA, 16), (16) Centre for Exoplanet Science, (17) INAF-Osservatorio Astrofisico Di Torino, 2), 2) ((1) Department of Physics, (2) Harvard-Smithsonian Center for Astrophysics, (3) Observatoire De Gen\\`eve, 4), (4) Centre for Exoplanet Science, (5) Astrophysics Research Centre, (6) Observatoire De Gen\\'eve, (7) INAF-Osservatorio Astronomico Di Palermo, (8) INAF-Osservatorio Astronomico di Padova, 9), (9) Dipartimento Di Fisica E Astronomia \"Galileo Galilei\", A. C. Cameron (4), A. G. Glenday (2), A. Ghedina (13), A. Mortier (10, A. Sozzetti (17), Astronomy, A. Szentgyorgyi (2), Belfast, Blackford Hill, Brena Baja, Cambridge, Cavendish Laboratory, C. A. Watson (12), C-H. Li (2), C. Lovis (6), D. Charbonneau (2), D. F. Phillips (2), D. Sasselov (2), D. S\\'egransan (6), D. W. Latham (2), Edinburgh, E. Molinari (13, F. Bouchy (3), F. Pepe (6), G. Micela (7), G. Piotto (8, Harvard University, H. M. Cegla (3), Institute for Astronomy, Italy, Italy), J. Costes (5), J. Maldonado (7), K. Rice (15, L. Malavolta (8, MA, M. Cecconi (13), M. Gonzalez (13), M. Lodi (13), M. L\\'opez-Morales (2), M. L. Palumbo Iii (2, M. Mayor (6), N. Buchschacher (3), N. Langellier (1, PA, Padova, Palermo, Physics, Queen's University Belfast, Queens University Belfast, R. Cosentino (13), R. D. Haywood (2), R. L. Walsworth (1, Royal Observatory, Sauverny, School of Mathematics, School of Physics, Selargius Ca, S. H. Saar (2), Spain, St Andrews, S. Thompson (10), S. Udry (6), SUPA, Switzerland, The Pennsylvania State University, T. W. Milbourne (1, UK, Universit\\`a di Padova, Universit\\'e de Gen\\`eve, University of Edinburgh, University of St Andrews, University Park, USA, Versoix, Via Osservatorio 20, X. Dumusque (6)","submitted_at":"2019-02-11T23:46:36Z","abstract_excerpt":"State of the art radial-velocity (RV) exoplanet searches are currently limited by RV signals arising from stellar magnetic activity. We analyze solar observations acquired over a 3-year period during the decline of Carrington Cycle 24 to test models of RV variation of Sun-like stars. A purpose-built solar telescope at the High Accuracy Radial velocity Planet Searcher for the Northern hemisphere (HARPS-N) provides disk-integrated solar spectra, from which we extract RVs and $\\log{R'_{\\rm HK}}$. The Solar Dynamics Observatory (SDO) provides disk-resolved images of magnetic activity. The Solar Ra"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1902.04184","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"}