{"paper":{"title":"Starspots on the fastest rotators in the Beta Pic moving group","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"2, (2) Grantecan CALP, 3), (3) Harvard-Smithsonian CfA (4), (5) South African Astronomical Observatory, (6) Research School of Astronomy, (7) Armagh Observatory, (8) Department of Physics, A.F. Lanza (4), Astrophysics, Australia, Australian National University, Bellville South Africa), C.J. Butler (7), D. Garcia-Alvarez (1, D. Kilkenny (8), F. van Wyk (5), INAF - Osservatorio Astrofisico di Catania, Ireland, Italy, J.G. Doyle (7), J.J. Drake (3), La Palma, R.R. Shobbrook (6), S. Messina (4), South Africa, Spain, Tenerife, V.L. Kashyap (3) ((1) Instituto de Astrof\\'isica de Canarias","submitted_at":"2011-07-28T11:56:00Z","abstract_excerpt":"Aims: We carried out high-resolution spectroscopy and BV(I)_C photometric monitoring of the two fastest late-type rotators in the nearby Beta Pictoris moving group, HD199143 (F7V) and CD-641208 (K7V). The motivation for this work is to investigate the rotation periods and photospheric spot patterns of these very young stars, with a longer term view to probing the evolution of rotation and magnetic activity during the early phases of main-sequence evolution. We also aim to derive information on key physical parameters, such as rotational velocity and rotation period. Methods: We applied maximum"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1107.5688","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"}