A Spectroscopic Analysis of a Sample of K2 Planet-host Stars: Stellar Parameters, Metallicities and Planetary Radii

Autores
Loaiza Tacuri, V.; Cunha, Katia; Smith, Verne V.; Martínez, Cintia Fernanda; Ghezzi, Luan; Schuler, Simon C.; Teske, Johanna; Howell, Steve B.
Año de publicación
2023
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The physical properties of transiting exoplanets are connected with the physical properties of their host stars. We present a homogeneous spectroscopic analysis based on the spectra of FGK-type stars observed with the Hydra spectrograph on the WIYN telescope. We derived the effective temperatures, surface gravities, and metallicities, for 81 stars observed by K2 and 33 by Kepler 1. We constructed an Fe i and ii line list that is adequate for the analysis of R ∼ 18,000 spectra covering 6050-6350 Å and adopted the spectroscopic technique based on equivalent-width measurements. The calculations were done in LTE using Kurucz model atmospheres and the qoyllur-quipu (q 2) package. We validated our methodology via an analysis of a benchmark solar twin and solar proxies, which are used as a solar reference. We estimated the effects that including Zeeman-sensitive Fe i lines have on the derived stellar parameters for young and possibly active stars in our sample and found them not to be significant. Stellar masses and radii were derived by combining the stellar parameters with Gaia EDR3 and V magnitudes and isochrones. The measured stellar radii have a 4.2% median internal precision, leading to a median internal uncertainty of 4.4% in the derived planetary radii. With our sample of 83 confirmed planets orbiting K2 host stars, the radius gap near R planet ∼ 1.9 R ⊕ is detected, in agreement with previous findings. Relations between the planetary radius, orbital period, and metallicity are explored and these also confirm previous findings for Kepler 1 systems.
Fil: Loaiza Tacuri, V.. Ministério de Ciencia, Tecnologia e Innovacao. Observatorio Nacional; Brasil
Fil: Cunha, Katia. Ministério de Ciencia, Tecnologia e Innovacao. Observatorio Nacional; Brasil. University of Arizona; Estados Unidos
Fil: Smith, Verne V.. No especifíca;
Fil: Martínez, Cintia Fernanda. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; Argentina
Fil: Ghezzi, Luan. Universidade Federal do Rio de Janeiro; Brasil
Fil: Schuler, Simon C.. University of Tampa; Estados Unidos
Fil: Teske, Johanna. No especifíca;
Fil: Howell, Steve B.. No especifíca;
Materia
(STARS:) PLANETARY SYSTEMS
STARS: FUNDAMENTAL PARAMETERS
TECHNIQUES: SPECTROSCOPIC, PARALLAXES
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/228065

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network_name_str CONICET Digital (CONICET)
spelling A Spectroscopic Analysis of a Sample of K2 Planet-host Stars: Stellar Parameters, Metallicities and Planetary RadiiLoaiza Tacuri, V.Cunha, KatiaSmith, Verne V.Martínez, Cintia FernandaGhezzi, LuanSchuler, Simon C.Teske, JohannaHowell, Steve B.(STARS:) PLANETARY SYSTEMSSTARS: FUNDAMENTAL PARAMETERSTECHNIQUES: SPECTROSCOPIC, PARALLAXEShttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1The physical properties of transiting exoplanets are connected with the physical properties of their host stars. We present a homogeneous spectroscopic analysis based on the spectra of FGK-type stars observed with the Hydra spectrograph on the WIYN telescope. We derived the effective temperatures, surface gravities, and metallicities, for 81 stars observed by K2 and 33 by Kepler 1. We constructed an Fe i and ii line list that is adequate for the analysis of R ∼ 18,000 spectra covering 6050-6350 Å and adopted the spectroscopic technique based on equivalent-width measurements. The calculations were done in LTE using Kurucz model atmospheres and the qoyllur-quipu (q 2) package. We validated our methodology via an analysis of a benchmark solar twin and solar proxies, which are used as a solar reference. We estimated the effects that including Zeeman-sensitive Fe i lines have on the derived stellar parameters for young and possibly active stars in our sample and found them not to be significant. Stellar masses and radii were derived by combining the stellar parameters with Gaia EDR3 and V magnitudes and isochrones. The measured stellar radii have a 4.2% median internal precision, leading to a median internal uncertainty of 4.4% in the derived planetary radii. With our sample of 83 confirmed planets orbiting K2 host stars, the radius gap near R planet ∼ 1.9 R ⊕ is detected, in agreement with previous findings. Relations between the planetary radius, orbital period, and metallicity are explored and these also confirm previous findings for Kepler 1 systems.Fil: Loaiza Tacuri, V.. Ministério de Ciencia, Tecnologia e Innovacao. Observatorio Nacional; BrasilFil: Cunha, Katia. Ministério de Ciencia, Tecnologia e Innovacao. Observatorio Nacional; Brasil. University of Arizona; Estados UnidosFil: Smith, Verne V.. No especifíca;Fil: Martínez, Cintia Fernanda. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; ArgentinaFil: Ghezzi, Luan. Universidade Federal do Rio de Janeiro; BrasilFil: Schuler, Simon C.. University of Tampa; Estados UnidosFil: Teske, Johanna. No especifíca;Fil: Howell, Steve B.. No especifíca;IOP Publishing2023-04info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/228065Loaiza Tacuri, V.; Cunha, Katia; Smith, Verne V.; Martínez, Cintia Fernanda; Ghezzi, Luan; et al.; A Spectroscopic Analysis of a Sample of K2 Planet-host Stars: Stellar Parameters, Metallicities and Planetary Radii; IOP Publishing; Astrophysical Journal; 946; 2; 4-2023; 1-240004-637XCONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.3847/1538-4357/acb137info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:51:52Zoai:ri.conicet.gov.ar:11336/228065instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 09:51:52.628CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv A Spectroscopic Analysis of a Sample of K2 Planet-host Stars: Stellar Parameters, Metallicities and Planetary Radii
title A Spectroscopic Analysis of a Sample of K2 Planet-host Stars: Stellar Parameters, Metallicities and Planetary Radii
spellingShingle A Spectroscopic Analysis of a Sample of K2 Planet-host Stars: Stellar Parameters, Metallicities and Planetary Radii
Loaiza Tacuri, V.
(STARS:) PLANETARY SYSTEMS
STARS: FUNDAMENTAL PARAMETERS
TECHNIQUES: SPECTROSCOPIC, PARALLAXES
title_short A Spectroscopic Analysis of a Sample of K2 Planet-host Stars: Stellar Parameters, Metallicities and Planetary Radii
title_full A Spectroscopic Analysis of a Sample of K2 Planet-host Stars: Stellar Parameters, Metallicities and Planetary Radii
title_fullStr A Spectroscopic Analysis of a Sample of K2 Planet-host Stars: Stellar Parameters, Metallicities and Planetary Radii
title_full_unstemmed A Spectroscopic Analysis of a Sample of K2 Planet-host Stars: Stellar Parameters, Metallicities and Planetary Radii
title_sort A Spectroscopic Analysis of a Sample of K2 Planet-host Stars: Stellar Parameters, Metallicities and Planetary Radii
dc.creator.none.fl_str_mv Loaiza Tacuri, V.
Cunha, Katia
Smith, Verne V.
Martínez, Cintia Fernanda
Ghezzi, Luan
Schuler, Simon C.
Teske, Johanna
Howell, Steve B.
author Loaiza Tacuri, V.
author_facet Loaiza Tacuri, V.
Cunha, Katia
Smith, Verne V.
Martínez, Cintia Fernanda
Ghezzi, Luan
Schuler, Simon C.
Teske, Johanna
Howell, Steve B.
author_role author
author2 Cunha, Katia
Smith, Verne V.
Martínez, Cintia Fernanda
Ghezzi, Luan
Schuler, Simon C.
Teske, Johanna
Howell, Steve B.
author2_role author
author
author
author
author
author
author
dc.subject.none.fl_str_mv (STARS:) PLANETARY SYSTEMS
STARS: FUNDAMENTAL PARAMETERS
TECHNIQUES: SPECTROSCOPIC, PARALLAXES
topic (STARS:) PLANETARY SYSTEMS
STARS: FUNDAMENTAL PARAMETERS
TECHNIQUES: SPECTROSCOPIC, PARALLAXES
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv The physical properties of transiting exoplanets are connected with the physical properties of their host stars. We present a homogeneous spectroscopic analysis based on the spectra of FGK-type stars observed with the Hydra spectrograph on the WIYN telescope. We derived the effective temperatures, surface gravities, and metallicities, for 81 stars observed by K2 and 33 by Kepler 1. We constructed an Fe i and ii line list that is adequate for the analysis of R ∼ 18,000 spectra covering 6050-6350 Å and adopted the spectroscopic technique based on equivalent-width measurements. The calculations were done in LTE using Kurucz model atmospheres and the qoyllur-quipu (q 2) package. We validated our methodology via an analysis of a benchmark solar twin and solar proxies, which are used as a solar reference. We estimated the effects that including Zeeman-sensitive Fe i lines have on the derived stellar parameters for young and possibly active stars in our sample and found them not to be significant. Stellar masses and radii were derived by combining the stellar parameters with Gaia EDR3 and V magnitudes and isochrones. The measured stellar radii have a 4.2% median internal precision, leading to a median internal uncertainty of 4.4% in the derived planetary radii. With our sample of 83 confirmed planets orbiting K2 host stars, the radius gap near R planet ∼ 1.9 R ⊕ is detected, in agreement with previous findings. Relations between the planetary radius, orbital period, and metallicity are explored and these also confirm previous findings for Kepler 1 systems.
Fil: Loaiza Tacuri, V.. Ministério de Ciencia, Tecnologia e Innovacao. Observatorio Nacional; Brasil
Fil: Cunha, Katia. Ministério de Ciencia, Tecnologia e Innovacao. Observatorio Nacional; Brasil. University of Arizona; Estados Unidos
Fil: Smith, Verne V.. No especifíca;
Fil: Martínez, Cintia Fernanda. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; Argentina
Fil: Ghezzi, Luan. Universidade Federal do Rio de Janeiro; Brasil
Fil: Schuler, Simon C.. University of Tampa; Estados Unidos
Fil: Teske, Johanna. No especifíca;
Fil: Howell, Steve B.. No especifíca;
description The physical properties of transiting exoplanets are connected with the physical properties of their host stars. We present a homogeneous spectroscopic analysis based on the spectra of FGK-type stars observed with the Hydra spectrograph on the WIYN telescope. We derived the effective temperatures, surface gravities, and metallicities, for 81 stars observed by K2 and 33 by Kepler 1. We constructed an Fe i and ii line list that is adequate for the analysis of R ∼ 18,000 spectra covering 6050-6350 Å and adopted the spectroscopic technique based on equivalent-width measurements. The calculations were done in LTE using Kurucz model atmospheres and the qoyllur-quipu (q 2) package. We validated our methodology via an analysis of a benchmark solar twin and solar proxies, which are used as a solar reference. We estimated the effects that including Zeeman-sensitive Fe i lines have on the derived stellar parameters for young and possibly active stars in our sample and found them not to be significant. Stellar masses and radii were derived by combining the stellar parameters with Gaia EDR3 and V magnitudes and isochrones. The measured stellar radii have a 4.2% median internal precision, leading to a median internal uncertainty of 4.4% in the derived planetary radii. With our sample of 83 confirmed planets orbiting K2 host stars, the radius gap near R planet ∼ 1.9 R ⊕ is detected, in agreement with previous findings. Relations between the planetary radius, orbital period, and metallicity are explored and these also confirm previous findings for Kepler 1 systems.
publishDate 2023
dc.date.none.fl_str_mv 2023-04
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/228065
Loaiza Tacuri, V.; Cunha, Katia; Smith, Verne V.; Martínez, Cintia Fernanda; Ghezzi, Luan; et al.; A Spectroscopic Analysis of a Sample of K2 Planet-host Stars: Stellar Parameters, Metallicities and Planetary Radii; IOP Publishing; Astrophysical Journal; 946; 2; 4-2023; 1-24
0004-637X
CONICET Digital
CONICET
url http://hdl.handle.net/11336/228065
identifier_str_mv Loaiza Tacuri, V.; Cunha, Katia; Smith, Verne V.; Martínez, Cintia Fernanda; Ghezzi, Luan; et al.; A Spectroscopic Analysis of a Sample of K2 Planet-host Stars: Stellar Parameters, Metallicities and Planetary Radii; IOP Publishing; Astrophysical Journal; 946; 2; 4-2023; 1-24
0004-637X
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.3847/1538-4357/acb137
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv IOP Publishing
publisher.none.fl_str_mv IOP Publishing
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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