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
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/21729
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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 Técnicas2025-09-29T09:44:34Zoai: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:34982025-09-29 09:44:34.61CONICET 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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1844613402531463168 |
score |
13.070432 |