{"paper":{"title":"The CARMENES search for exoplanets around M dwarfs. The He I triplet at 10830 $\\mathrm{\\AA}\\,$ across the M dwarf sequence","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"A. Kaminski, A. Quirrenbach, A. Reiners, B. Fuhrmeister, D. Galad\\'i-Enr\\'iquez, D. Hintz, D. Montes, E. D\\'iez-Alonso, E. Nagel, E.N. Johnson, E. W. Guenther, F. F. Bauer, I. Ribas, J. A. Caballero, J. H. M. M. Schmitt, J. Sanz-Forcada, L. Hildebrandt, M. Cort\\'es-Contreras, M. K\\\"urster, M. Lafarga, M. Zechmeister, P. J. Amado, P. Sch\\\"ofer, S. Czesla, S. Dreizler, S. V. Jeffers, V. J. S. B\\'ejar","submitted_at":"2019-11-01T08:18:58Z","abstract_excerpt":"The He I infrared (IR) triplet at 10830 AA is an important activity indicator for the Sun and in solar-type stars, however, it has rarely been studied in relation to M dwarfs to date. In this study, we use the time-averaged spectra of 319 single stars with spectral types ranging from M0.0 V to M9.0 V obtained with the CARMENES high resolution optical and near-infrared spectrograph at Calar Alto to study the properties of the He I IR triplet lines. In quiescence, we find the triplet in absorption with a decrease of the measured pseudo equivalent width (pEW) towards later sub-types. For stars la"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1911.00246","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/1911.00246/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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"}