The CARMENES search for exoplanets around M dwarfs Nine new double-line spectroscopic binary stars

Context. The CARMENES spectrograph is surveying similar to 300 M dwarf stars in search for exoplanets. Among the target stars, spectroscopic binary systems have been discovered, which can be used to measure fundamental properties of stars. Aims. Using spectroscopic observations, we determine the orb...

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Detalles Bibliográficos
Autores: Cortés Contreras, Miriam, Montes Gutiérrez, David, otros, ...
Tipo de recurso: artículo
Fecha de publicación:2018
País:España
Institución:Universidad Complutense de Madrid (UCM)
Repositorio:Docta Complutense
Idioma:inglés
OAI Identifier:oai:docta.ucm.es:20.500.14352/13006
Acceso en línea:https://hdl.handle.net/20.500.14352/13006
Access Level:acceso abierto
Palabra clave:52
M-circle-dot
Mass eclipsing binary
Wfcam transit survey
Time-series analysis
Sky automated survey
Nearby m dwarfs
Solar neighborhood
Main-sequence
Magnetic activity
Multiple systems
Astrofísica
Astronomía (Física)
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repository_id_str
spelling The CARMENES search for exoplanets around M dwarfs Nine new double-line spectroscopic binary starsCortés Contreras, MiriamMontes Gutiérrez, Davidotros, ...52M-circle-dotMass eclipsing binaryWfcam transit surveyTime-series analysisSky automated surveyNearby m dwarfsSolar neighborhoodMain-sequenceMagnetic activityMultiple systemsAstrofísicaAstronomía (Física)Context. The CARMENES spectrograph is surveying similar to 300 M dwarf stars in search for exoplanets. Among the target stars, spectroscopic binary systems have been discovered, which can be used to measure fundamental properties of stars. Aims. Using spectroscopic observations, we determine the orbital and physical properties of nine new double-line spectroscopic binary systems by analysing their radial velocity curves. Methods. We use two-dimensional cross-correlation techniques to derive the radial velocities of the targets, which are then employed to determine the orbital properties. Photometric data from the literature are also analysed to search for possible eclipses and to measure stellar variability, which can yield rotation periods. Results. Out of the 342 stars selected for the CARMENES survey, 9 have been found to be double-line spectroscopic binaries, with periods ranging from 1.13 to similar to 8000 days and orbits with eccentricities up to 0.54. We provide empirical orbital properties and minimum masses for the sample of spectroscopic binaries. Absolute masses are also estimated from mass-luminosity calibrations, ranging between similar to 0.1 and similar to 0.6 M-circle dot. Conclusions. These new binary systems increase the number of double-line M dwarf binary systems with known orbital parameters by 15%, and they have lower mass ratios on average.EDP Sciences S AUniversidad Complutense de Madrid20182018-11-0720182018-11-07journal articlehttp://purl.org/coar/resource_type/c_6501info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/20.500.14352/13006reponame:Docta Complutenseinstname:Universidad Complutense de Madrid (UCM)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:docta.ucm.es:20.500.14352/130062026-06-02T12:44:21Z
dc.title.none.fl_str_mv The CARMENES search for exoplanets around M dwarfs Nine new double-line spectroscopic binary stars
title The CARMENES search for exoplanets around M dwarfs Nine new double-line spectroscopic binary stars
spellingShingle The CARMENES search for exoplanets around M dwarfs Nine new double-line spectroscopic binary stars
Cortés Contreras, Miriam
52
M-circle-dot
Mass eclipsing binary
Wfcam transit survey
Time-series analysis
Sky automated survey
Nearby m dwarfs
Solar neighborhood
Main-sequence
Magnetic activity
Multiple systems
Astrofísica
Astronomía (Física)
title_short The CARMENES search for exoplanets around M dwarfs Nine new double-line spectroscopic binary stars
title_full The CARMENES search for exoplanets around M dwarfs Nine new double-line spectroscopic binary stars
title_fullStr The CARMENES search for exoplanets around M dwarfs Nine new double-line spectroscopic binary stars
title_full_unstemmed The CARMENES search for exoplanets around M dwarfs Nine new double-line spectroscopic binary stars
title_sort The CARMENES search for exoplanets around M dwarfs Nine new double-line spectroscopic binary stars
dc.creator.none.fl_str_mv Cortés Contreras, Miriam
Montes Gutiérrez, David
otros, ...
author Cortés Contreras, Miriam
author_facet Cortés Contreras, Miriam
Montes Gutiérrez, David
otros, ...
author_role author
author2 Montes Gutiérrez, David
otros, ...
author2_role author
author
dc.contributor.none.fl_str_mv Universidad Complutense de Madrid
dc.subject.none.fl_str_mv 52
M-circle-dot
Mass eclipsing binary
Wfcam transit survey
Time-series analysis
Sky automated survey
Nearby m dwarfs
Solar neighborhood
Main-sequence
Magnetic activity
Multiple systems
Astrofísica
Astronomía (Física)
topic 52
M-circle-dot
Mass eclipsing binary
Wfcam transit survey
Time-series analysis
Sky automated survey
Nearby m dwarfs
Solar neighborhood
Main-sequence
Magnetic activity
Multiple systems
Astrofísica
Astronomía (Física)
description Context. The CARMENES spectrograph is surveying similar to 300 M dwarf stars in search for exoplanets. Among the target stars, spectroscopic binary systems have been discovered, which can be used to measure fundamental properties of stars. Aims. Using spectroscopic observations, we determine the orbital and physical properties of nine new double-line spectroscopic binary systems by analysing their radial velocity curves. Methods. We use two-dimensional cross-correlation techniques to derive the radial velocities of the targets, which are then employed to determine the orbital properties. Photometric data from the literature are also analysed to search for possible eclipses and to measure stellar variability, which can yield rotation periods. Results. Out of the 342 stars selected for the CARMENES survey, 9 have been found to be double-line spectroscopic binaries, with periods ranging from 1.13 to similar to 8000 days and orbits with eccentricities up to 0.54. We provide empirical orbital properties and minimum masses for the sample of spectroscopic binaries. Absolute masses are also estimated from mass-luminosity calibrations, ranging between similar to 0.1 and similar to 0.6 M-circle dot. Conclusions. These new binary systems increase the number of double-line M dwarf binary systems with known orbital parameters by 15%, and they have lower mass ratios on average.
publishDate 2018
dc.date.none.fl_str_mv 2018
2018-11-07
2018
2018-11-07
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/20.500.14352/13006
url https://hdl.handle.net/20.500.14352/13006
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv EDP Sciences S A
publisher.none.fl_str_mv EDP Sciences S A
dc.source.none.fl_str_mv reponame:Docta Complutense
instname:Universidad Complutense de Madrid (UCM)
instname_str Universidad Complutense de Madrid (UCM)
reponame_str Docta Complutense
collection Docta Complutense
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.301603

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