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dc.rights.license© ESO 2019-
dc.contributor.authorFuhrmeister, B.-
dc.contributor.authorCzesla, S.-
dc.contributor.authorHildebrandt, L.-
dc.contributor.authorNagel, E.-
dc.contributor.authorSchmitt, H. M. M.-
dc.contributor.authorHintz, D.-
dc.contributor.authorJohnson, E. N.-
dc.contributor.authorSanz Forcada, J.-
dc.contributor.authorSchöfer, P.-
dc.contributor.authorJeffers, S. V.-
dc.contributor.authorCaballero, J. A.-
dc.contributor.authorZechmeister, M.-
dc.contributor.authorReiners, A.-
dc.contributor.authorRibas, I.-
dc.contributor.authorAmado, P. J.-
dc.contributor.authorQuirrenbach, A.-
dc.contributor.authorBauer, F. F.-
dc.contributor.authorBéjar, V. J. S.-
dc.contributor.authorCortés Contreras, M.-
dc.contributor.authorDíez Alonso, E.-
dc.contributor.authorDreizler, S.-
dc.contributor.authorGaladí Enríquez, D.-
dc.contributor.authorGuenther, E. W.-
dc.contributor.authorKaminski, A.-
dc.contributor.authorKürster, M.-
dc.contributor.authorLafarga, M.-
dc.contributor.authorMontes, D.-
dc.contributor.otherUnidad de Excelencia Científica María de Maeztu Centro de Astrobiología del Instituto Nacional de Técnica Aeroespacial y CSIC, MDM-2017-0737-
dc.contributor.otherCentros de Excelencia Severo Ochoa, INSTITUTO DE ASTROFISICA DE ANDALUCIA (IAA), SEV-2017-0709-
dc.contributor.otherCentros de Excelencia Severo Ochoa, INSTITUTO DE ASTROFÍSICA DE CANARIAS (IAC), SEV-2015-0548-
dc.identifier.citationAstronomy and Astrophysics 632: A24(2019)es
dc.descriptionFull Table 2 is only available at the CDS via anonymous ftp to ( or via
dc.description.abstractThe He I infrared (IR) triplet at 10 830 Å 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 later than M5.0 V, the He I triplet becomes undetectable in our study. This dependence on effective temperature may be related to a change in chromospheric conditions along the M dwarf sequence. When an emission in the triplet is observed, we attribute it to flaring. The absence of emission during quiescence is consistent with line formation by photo-ionisation and recombination, while flare emission may be caused by collisions within dense material. The He I triplet tends to increase in depth according to increasing activity levels, ultimately becoming filled in; however, we do not find a correlation between the pEW(He IR) and X-ray properties. This behaviour may be attributed to the absence of very inactive stars (LX∕Lbol < −5.5) in our sample or to the complex behaviour with regard to increasing depth and filling
dc.description.sponsorshipB.F. acknowledges funding by the DFG under Schm 1032/69-1. CARMENES is an instrument for the Centro Astronomico Hispano-Aleman de Calar Alto (CAHA, Almeria, Spain). CARMENES is funded by the German Max-Planck-Gesellschaft (MPG), the Spanish Consejo Superior de Investigaciones Cientificas (CSIC), the European Union through FEDER/ERF FICTS-2011-02 funds, and the members of the CARMENES Consortium (Max-Planck-Institut fur Astronomie, Instituto de Astrofisica de Andalucia, Landessternwarte Konigstuhl, Institut de Ciencies de l'Espai, Institut fur Astro-physik Gottingen, Universidad Complutense de Madrid, Thuringer Landesstern-warte Tautenburg, Instituto de Astrofisica de Canarias, Hamburger Sternwarte, Centro de Astrobiologia and Centro Astronomico Hispano-Aleman), with addi-tional contributions by the Spanish Ministry of Economy, the German Science Foundation through the Major Research Instrumentation Programme and DFG Research Unit FOR2544 "Blue Planets around Red Stars", the Klaus Tschira Stiftung, the states of Baden-Wurttemberg and Niedersachsen, and by the Junta de Andalucia. Based on data from the CARMENES data archive at CAB (INTA-CSIC). We acknowledge financial support from the Agencia Estatal de Investigacion of the Ministerio de Ciencia, Innovacion y Universidades and the European FEDER/ERF funds through projects AYA2015-69350-C3-2-P, ESP2016-80435-C2-1-R, AYA2016-79425-C3-1/2/3-P, ESP2017-87676-C5-1-R, and the Centre of Excellence "Severo Ochoa" and "Maria de Maeztu" awards to the Instituto de Astrofisica de Canarias (SEV-2015-0548), Instituto de Astrofisica de Andalucia (SEV-2017-0709), and Centro de Astrobiologia (MDM-20170737), and the "Generalitat de Catalunya/CERCA programme"; With funding from the Spanish government through the "María de Maeztu Unit of Excellence" accreditation (MDM-2017-0737)es
dc.publisherEDP Scienceses
dc.relationinfo:eu-repo/grantAgreement/MINECO//AYA2015-69350-C3-2-P/ES/ORIGEN Y EVOLUCION DE LAS ENANAS MARRONES Y PLANETAS GIGANTES/-
dc.relationinfo:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/ESP2016-80435-C2-1-R/ES/PONIENDO LA TIERRA Y EL SISTEMA SOLAR EN CONTEXTO: CIENCIA Y TECNOLOGIA DE CARMENES, CHEOPS, PLATO Y ARIEL/-
dc.relationinfo:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/AYA2016-79425-C3-1-P/ES/EXPLOTACION CIENTIFICA DE CARMENES Y PREPARACION DE LOS PROXIMOS BUSCADORES DE EXOPLANETAS/-
dc.relationinfo:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/ESP2017-87676-C5-1-R-
dc.relationinfo:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/AYA2016-79425-C3-2-P/ES/ENANAS MARRONES Y PLANETAS AISLADOS Y COMO COMPAÑEROS DE ESTRELLAS/-
dc.relationinfo:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/AYA2016-79425-C3-3-P/ES/ENTENDIENDO LA ESTRUCTURA INTERNA, LA EVOLUCION Y LA VARIABILIDAD DE ESTRELLAS DE BAJA MASA CON PLANETAS/-
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International*
dc.subjectStars: activityes
dc.subjectStars: chromosphereses
dc.subjectStars: late typees
dc.titleThe CARMENES search for exoplanets around M dwarfs The He I triplet at 10830 Å across the M dwarf sequencees
dc.contributor.orcidRibas, I. [0000-0002-6689-0312]-
dc.contributor.orcidMontes, D. [0000-0002-7779-238X]-
dc.contributor.orcidLafarga, M. [0000-0002-8815-9416]-
dc.contributor.orcidAmado, P. [0000-0001-8012-3788]-
dc.contributor.orcidNagel, E. [0000-0002-4019-3631]-
dc.contributor.funderDeutsche Forschungsgemeinschaft (DFG)-
dc.contributor.funderMinisterio de Economía y Competitividad (MINECO)-
dc.contributor.funderAgencia Estatal de Investigación (AEI)-
dc.description.peerreviewedPeer reviewes
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