Publication:
The CARMENES search for exoplanets around M dwarfs : the He I triplet at 10830 Å across the M dwarf sequence

dc.contributor.authorFuhrmeister, B.
dc.contributor.authorCzesla, S.
dc.contributor.authorHildebrandt, L.
dc.contributor.authorMontes Gutiérrez, David
dc.contributor.authorDiez-Alonso, E.
dc.contributor.authorotros,...
dc.date.accessioned2023-10-20T18:25:57Z
dc.date.available2023-10-20T18:25:57Z
dc.date.issued2019-11-25
dc.descriptionArtículo firmado por 27 autores
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 (L_X∕L_bol < −5.5) in our sample or to the complex behaviour with regard to increasing depth and filling in.
dc.description.departmentDepto. de Física de la Tierra y Astrofísica
dc.description.facultyFac. de Ciencias Físicas
dc.description.facultyInstituto de Física de Partículas y del Cosmos (IPARCOS)
dc.description.refereedTRUE
dc.description.sponsorshipGerman Research Foundation (DFG)
dc.description.sponsorshipGerman Max-Planck-Gesellschaft (MPG)
dc.description.sponsorshipConsejo Superior de Investigaciones Cientificas (CSIC)
dc.description.sponsorshipEuropean Union through FEDER/ERF
dc.description.sponsorshipMax-Planck-Institut fur Astronomie
dc.description.sponsorshipInstituto de Astrofisica de Andalucia
dc.description.sponsorshipLandessternwarte Konigstuhl
dc.description.sponsorshipInstitut de Ciencies de l'Espai
dc.description.sponsorshipInstitut fur Astro-physik Gottingen
dc.description.sponsorshipUniversidad Complutense de Madrid
dc.description.sponsorshipThuringer Landesstern-warte Tautenburg
dc.description.sponsorshipInstituto de Astrofisica de Canarias
dc.description.sponsorshipHamburger Sternwarte
dc.description.sponsorshipCentro de Astrobiología
dc.description.sponsorshipCentro Astronómico Hispano-Alemán
dc.description.sponsorshipMinisterio de Economia y Competitividad (MINECO)
dc.description.sponsorshipGerman Science Foundation through the Major Research Instrumentation Programme
dc.description.sponsorshipKlaus Tschira Stiftung
dc.description.sponsorshipState of Baden-Wurttemberg
dc.description.sponsorshipSstate of Niedersachsen
dc.description.sponsorshipJunta de Andalucía
dc.description.sponsorshipCentros de Excelencia Severo Ochoa
dc.description.sponsorshipUnidad de Excelencia María de Maeztu
dc.description.sponsorshipGeneralitat de Catalunya/CERCA
dc.description.statuspub
dc.identifier.doi10.1051/0004-6361/201936193
dc.identifier.essn1432-0746
dc.identifier.issn0004-6361
dc.identifier.officialurlhttps://www.aanda.org/articles/aa/full_html/2019/12/aa36193-19/aa36193-19.html
dc.identifier.urihttps://hdl.handle.net/20.500.14352/88361
dc.journal.titleAstronomy & Astrophysics
dc.language.isoeng
dc.publisherEDP Sciences
dc.relation.projectIDSchm 1032/69-1
dc.relation.projectIDFOR2544
dc.relation.projectIDFICTS-2011-02
dc.relation.projectIDinfo:eu-repo/grantAgreement/MINECO//AYA2015-69350-C3-2-P/ES/ORIGEN Y EVOLUCION DE LAS ENANAS MARRONES Y PLANETAS GIGANTES/
dc.relation.projectIDESP2016-80435-C2-1-R
dc.relation.projectIDAYA2016-79425-C3-1/2/3-P
dc.relation.projectIDinfo:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/ESP2017-87676-C5-1-R/ES/CONTRIBUCION ESPAÑOLA A LA MISION ESPACIAL PLATO2.0. FASES B2%2FC%2FD/
dc.relation.projectIDinfo:eu-repo/grantAgreement/MINECO//SEV-2015-0548/ES/INSTITUTO DE ASTROFISICA DE CANARIAS/
dc.relation.projectIDSEV-2017-0709
dc.relation.projectIDMDM-20170737
dc.rights.accessRightsopen access
dc.subject.cdu52
dc.subject.keywordStars: activity
dc.subject.keywordStars: chromospheres
dc.subject.keywordStars: lite-type
dc.subject.ucmAstrofísica
dc.subject.unesco21 Astronomía y Astrofísica
dc.titleThe CARMENES search for exoplanets around M dwarfs : the He I triplet at 10830 Å across the M dwarf sequence
dc.typejournal article
dc.type.hasVersionVoR
dc.volume.number632
dspace.entity.typePublication
relation.isAuthorOfPublication2dfe4286-12c7-4d3a-bfda-d298a90cc8fe
relation.isAuthorOfPublication.latestForDiscovery2dfe4286-12c7-4d3a-bfda-d298a90cc8fe
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