{"paper":{"title":"The CARMENES search for exoplanets around M dwarfs: Radial-velocity variations of active stars in visual-channel spectra","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.EP"],"primary_cat":"astro-ph.SR","authors_text":"A. P. Hatzes, A. Quirrenbach, A. Reiners, B. Fuhrmeister, D. Montes, D. Shulyak, E. N. Johnson, F. F. Bauer, I. Ribas, J. A. Caballero, J. Aceituno, J. C. Morales, L. Tal-Or, M. K\\\"urster, M. Lafarga, M. Zechmeister, P. J. Amado, P. Sch\\\"ofer, S. Czesla, S. Dreizler, S. Reffert, S. Sadegi, S. V. Jeffers, V. J. S. B\\'ejar, W. Seifert","submitted_at":"2018-03-06T18:54:41Z","abstract_excerpt":"Previous simulations predicted the activity-induced radial-velocity (RV) variations of M dwarfs to range from $\\sim1$ cm/s to $\\sim1$ km/s, depending on various stellar and activity parameters. We investigate the observed relations between RVs, stellar activity, and stellar parameters of M dwarfs by analyzing CARMENES high-resolution visual-channel spectra ($0.5$$-$$1$$\\mu$m), which were taken within the CARMENES RV planet survey during its first $20$ months of operation. During this time, $287$ of the CARMENES-sample stars were observed at least five times. From each spectrum we derived a rel"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1803.02338","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"}