A possible long-term activity cycle for ι Horologii: First results from SPI-HKα project

Autores
Flores, Matias G.; Buccino, Andrea Paola; Saffe, Carlos; Mauas, Pablo Jacobo David
Año de publicación
2017
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
In order to detect stellar activity cycles and study possiblestar-planet interactions (SPIs), we have been developing the HKαand SPI-HKα projects since 1999 and 2012 respectively. In thiswork, we present preliminary results of possible SPIs from studies ofchromospheric activity and look for possible correlations betweenstellar activity and stellar/planetary parameters. We find that forstars with a similar Teff, stellar activity increases withthe mass of the planet, similar to results from previous works. However,stellar ages can also play a role, and a larger stellar sample is neededto verify these trends. We also note that some of these stars present aremarkably high level of chromospheric activity, comparable even withRSCvn or BY Dra active stars. In addition, we do not observe anycorrelation between stellar activity and semi-major axis. We present thefirst long-term activity study of the star ι Horologii, a youngsolar-type star that hosts a non-transiting Jovian planet and exhibits ahigh activity level. We analysed our own spectra, obtained between 2002and 2015, in conjunction with public HARPS (High Accuracy Radialvelocity Planet Searcher) observations. We calculated the Ca II indexesderived from the 987 Complejo Astronómico El Leoncito (CASLEO)and HARPS spectra and converted them to the Mt Wilson scale. We found along-term activity cycle of ?5 yr which fits the active sequenceof Böhm-Vitense. The amplitude of this longer cycle is irregular,as was also observed for the shorter cycle. This phenomenon could beattributable to an antisymmetric distribution of active regions on thestellar surface.
Fil: Flores, Matias G.. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Instituto de Ciencias Astronómicas, de la Tierra y del Espacio. Universidad Nacional de San Juan. Instituto de Ciencias Astronómicas, de la Tierra y del Espacio; Argentina
Fil: Buccino, Andrea Paola. Consejo Nacional de Investigaciónes 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: Saffe, Carlos. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Física; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Mauas, Pablo Jacobo David. Consejo Nacional de Investigaciónes 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
Materia
planet-star interactions
stars: activity
stars: individual: ι Horologii
stars: individual: ι Horologii
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:11336/21729
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/21729
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling A possible long-term activity cycle for ι Horologii: First results from SPI-HKα projectFlores, Matias G.Buccino, Andrea PaolaSaffe, CarlosMauas, Pablo Jacobo Davidplanet-star interactionsstars: activitystars: individual: ι Horologiistars: individual: ι Horologiihttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1In order to detect stellar activity cycles and study possiblestar-planet interactions (SPIs), we have been developing the HKαand SPI-HKα projects since 1999 and 2012 respectively. In thiswork, we present preliminary results of possible SPIs from studies ofchromospheric activity and look for possible correlations betweenstellar activity and stellar/planetary parameters. We find that forstars with a similar T<sub>eff</sub>, stellar activity increases withthe mass of the planet, similar to results from previous works. However,stellar ages can also play a role, and a larger stellar sample is neededto verify these trends. We also note that some of these stars present aremarkably high level of chromospheric activity, comparable even withRSCvn or BY Dra active stars. In addition, we do not observe anycorrelation between stellar activity and semi-major axis. We present thefirst long-term activity study of the star ι Horologii, a youngsolar-type star that hosts a non-transiting Jovian planet and exhibits ahigh activity level. We analysed our own spectra, obtained between 2002and 2015, in conjunction with public HARPS (High Accuracy Radialvelocity Planet Searcher) observations. We calculated the Ca II indexesderived from the 987 Complejo Astronómico El Leoncito (CASLEO)and HARPS spectra and converted them to the Mt Wilson scale. We found along-term activity cycle of ?5 yr which fits the active sequenceof Böhm-Vitense. The amplitude of this longer cycle is irregular,as was also observed for the shorter cycle. This phenomenon could beattributable to an antisymmetric distribution of active regions on thestellar surface.Fil: Flores, Matias G.. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Instituto de Ciencias Astronómicas, de la Tierra y del Espacio. Universidad Nacional de San Juan. Instituto de Ciencias Astronómicas, de la Tierra y del Espacio; ArgentinaFil: Buccino, Andrea Paola. Consejo Nacional de Investigaciónes 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: Saffe, Carlos. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Física; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Mauas, Pablo Jacobo David. Consejo Nacional de Investigaciónes 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; ArgentinaOxford University Press2017-02info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/21729Flores, Matias G.; Buccino, Andrea Paola; Saffe, Carlos; Mauas, Pablo Jacobo David; A possible long-term activity cycle for ι Horologii: First results from SPI-HKα project; Oxford University Press; Monthly Notices of the Royal Astronomical Society; 464; 4; 2-2017; 4299-43050035-8711CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1093/mnras/stw2650info:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/mnras/article-abstract/464/4/4299/2527888/A-possible-long-term-activity-cycle-for-Horologii?redirectedFrom=fulltextinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T11:13:23Zoai:ri.conicet.gov.ar:11336/21729instacron: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:34982025-10-22 11:13:23.75CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv A possible long-term activity cycle for ι Horologii: First results from SPI-HKα project
title A possible long-term activity cycle for ι Horologii: First results from SPI-HKα project
spellingShingle A possible long-term activity cycle for ι Horologii: First results from SPI-HKα project
Flores, Matias G.
planet-star interactions
stars: activity
stars: individual: ι Horologii
stars: individual: ι Horologii
title_short A possible long-term activity cycle for ι Horologii: First results from SPI-HKα project
title_full A possible long-term activity cycle for ι Horologii: First results from SPI-HKα project
title_fullStr A possible long-term activity cycle for ι Horologii: First results from SPI-HKα project
title_full_unstemmed A possible long-term activity cycle for ι Horologii: First results from SPI-HKα project
title_sort A possible long-term activity cycle for ι Horologii: First results from SPI-HKα project
dc.creator.none.fl_str_mv Flores, Matias G.
Buccino, Andrea Paola
Saffe, Carlos
Mauas, Pablo Jacobo David
author Flores, Matias G.
author_facet Flores, Matias G.
Buccino, Andrea Paola
Saffe, Carlos
Mauas, Pablo Jacobo David
author_role author
author2 Buccino, Andrea Paola
Saffe, Carlos
Mauas, Pablo Jacobo David
author2_role author
author
author
dc.subject.none.fl_str_mv planet-star interactions
stars: activity
stars: individual: ι Horologii
stars: individual: ι Horologii
topic planet-star interactions
stars: activity
stars: individual: ι Horologii
stars: individual: ι Horologii
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv In order to detect stellar activity cycles and study possiblestar-planet interactions (SPIs), we have been developing the HKαand SPI-HKα projects since 1999 and 2012 respectively. In thiswork, we present preliminary results of possible SPIs from studies ofchromospheric activity and look for possible correlations betweenstellar activity and stellar/planetary parameters. We find that forstars with a similar T<sub>eff</sub>, stellar activity increases withthe mass of the planet, similar to results from previous works. However,stellar ages can also play a role, and a larger stellar sample is neededto verify these trends. We also note that some of these stars present aremarkably high level of chromospheric activity, comparable even withRSCvn or BY Dra active stars. In addition, we do not observe anycorrelation between stellar activity and semi-major axis. We present thefirst long-term activity study of the star ι Horologii, a youngsolar-type star that hosts a non-transiting Jovian planet and exhibits ahigh activity level. We analysed our own spectra, obtained between 2002and 2015, in conjunction with public HARPS (High Accuracy Radialvelocity Planet Searcher) observations. We calculated the Ca II indexesderived from the 987 Complejo Astronómico El Leoncito (CASLEO)and HARPS spectra and converted them to the Mt Wilson scale. We found along-term activity cycle of ?5 yr which fits the active sequenceof Böhm-Vitense. The amplitude of this longer cycle is irregular,as was also observed for the shorter cycle. This phenomenon could beattributable to an antisymmetric distribution of active regions on thestellar surface.
Fil: Flores, Matias G.. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Instituto de Ciencias Astronómicas, de la Tierra y del Espacio. Universidad Nacional de San Juan. Instituto de Ciencias Astronómicas, de la Tierra y del Espacio; Argentina
Fil: Buccino, Andrea Paola. Consejo Nacional de Investigaciónes 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: Saffe, Carlos. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Física; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Mauas, Pablo Jacobo David. Consejo Nacional de Investigaciónes 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
description In order to detect stellar activity cycles and study possiblestar-planet interactions (SPIs), we have been developing the HKαand SPI-HKα projects since 1999 and 2012 respectively. In thiswork, we present preliminary results of possible SPIs from studies ofchromospheric activity and look for possible correlations betweenstellar activity and stellar/planetary parameters. We find that forstars with a similar T<sub>eff</sub>, stellar activity increases withthe mass of the planet, similar to results from previous works. However,stellar ages can also play a role, and a larger stellar sample is neededto verify these trends. We also note that some of these stars present aremarkably high level of chromospheric activity, comparable even withRSCvn or BY Dra active stars. In addition, we do not observe anycorrelation between stellar activity and semi-major axis. We present thefirst long-term activity study of the star ι Horologii, a youngsolar-type star that hosts a non-transiting Jovian planet and exhibits ahigh activity level. We analysed our own spectra, obtained between 2002and 2015, in conjunction with public HARPS (High Accuracy Radialvelocity Planet Searcher) observations. We calculated the Ca II indexesderived from the 987 Complejo Astronómico El Leoncito (CASLEO)and HARPS spectra and converted them to the Mt Wilson scale. We found along-term activity cycle of ?5 yr which fits the active sequenceof Böhm-Vitense. The amplitude of this longer cycle is irregular,as was also observed for the shorter cycle. This phenomenon could beattributable to an antisymmetric distribution of active regions on thestellar surface.
publishDate 2017
dc.date.none.fl_str_mv 2017-02
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/11336/21729
Flores, Matias G.; Buccino, Andrea Paola; Saffe, Carlos; Mauas, Pablo Jacobo David; A possible long-term activity cycle for ι Horologii: First results from SPI-HKα project; Oxford University Press; Monthly Notices of the Royal Astronomical Society; 464; 4; 2-2017; 4299-4305
0035-8711
CONICET Digital
CONICET
url http://hdl.handle.net/11336/21729
identifier_str_mv Flores, Matias G.; Buccino, Andrea Paola; Saffe, Carlos; Mauas, Pablo Jacobo David; A possible long-term activity cycle for ι Horologii: First results from SPI-HKα project; Oxford University Press; Monthly Notices of the Royal Astronomical Society; 464; 4; 2-2017; 4299-4305
0035-8711
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1093/mnras/stw2650
info:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/mnras/article-abstract/464/4/4299/2527888/A-possible-long-term-activity-cycle-for-Horologii?redirectedFrom=fulltext
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
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Oxford University Press
publisher.none.fl_str_mv Oxford University Press
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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