Magnetic Activity Cycles in the Exoplanet Host Star ǫ Eridani

Autores
Metcalfe, T. S.; Buccino, Andrea Paola; Brown, B. P.; Mathur, S.; Soderblom, D. R.; Henry, T. J.; Mauas, Pablo Jacobo David; Petrucci, Romina Paola; Hall, J. C.; Basu, S.
Año de publicación
2013
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The active K2 dwarf ǫ Eri has been extensively characterized, both as a young solar analog and more recently as an exoplanet host star. As one of the nearest and brightest stars in the sky, it provides an unparalleled opportunity to constrain stellar dynamo theory beyond the Sun. We confirm and document the 3 year magnetic activity cycle in ǫ Eri originally reported by Hatzes and coworkers, and we examine the archival data from previous observations spanning 45 years. The data show coexisting 3 year and 13 year periods leading into a broad activity minimum that resembles a Maunder minimum-like state, followed by the resurgence of a coherent 3 year cycle. The nearly continuous activity record suggests the imultaneous operation of two stellar dynamos with cycle periods of 2.95 ± 0.03 years and 12.7 ± 0.3 years, which by analogy with the solar case suggests a revised identification of the dynamo mechanisms that are responsible for the so-called “active” and “inactive” sequences as proposed by Böhm-Vitense. Finally, based on the observed properties of ǫ Eri we argue that the rotational history of the Sun is what makes it an outlier in the context of magnetic cycles observed in other stars (as also suggested by its Li depletion), and that a Jovian-mass companion cannot be the universal explanation for the solar peculiarities.
Fil: Metcalfe, T. S.. Space Science Institute; Estados Unidos
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: Brown, B. P.. University Of Wisconsin; Estados Unidos
Fil: Mathur, S.. Space Science Institute; Estados Unidos. High Altitude Observatory, NCAR; Estados Unidos
Fil: Soderblom, D. R.. Space Telescope Science Institute; Estados Unidos
Fil: Henry, T. J.. Georgia State University; Estados Unidos
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
Fil: Petrucci, Romina 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. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Complejo Astronómico "el Leoncito". Universidad Nacional de Córdoba. Complejo Astronómico ; Argentina
Fil: Hall, J. C.. Lowell Observatory; Estados Unidos
Fil: Basu, S.. University Of Yale; Estados Unidos
Materia
Stars: Activity
Stars: Chromospheres
Stars: Individual(Hd 22049)
Surveys
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:11336/17059
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/17059
network_acronym_str CONICETDig
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network_name_str CONICET Digital (CONICET)
spelling Magnetic Activity Cycles in the Exoplanet Host Star ǫ EridaniMetcalfe, T. S.Buccino, Andrea PaolaBrown, B. P.Mathur, S.Soderblom, D. R.Henry, T. J.Mauas, Pablo Jacobo DavidPetrucci, Romina PaolaHall, J. C.Basu, S.Stars: ActivityStars: ChromospheresStars: Individual(Hd 22049)Surveyshttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1The active K2 dwarf ǫ Eri has been extensively characterized, both as a young solar analog and more recently as an exoplanet host star. As one of the nearest and brightest stars in the sky, it provides an unparalleled opportunity to constrain stellar dynamo theory beyond the Sun. We confirm and document the 3 year magnetic activity cycle in ǫ Eri originally reported by Hatzes and coworkers, and we examine the archival data from previous observations spanning 45 years. The data show coexisting 3 year and 13 year periods leading into a broad activity minimum that resembles a Maunder minimum-like state, followed by the resurgence of a coherent 3 year cycle. The nearly continuous activity record suggests the imultaneous operation of two stellar dynamos with cycle periods of 2.95 ± 0.03 years and 12.7 ± 0.3 years, which by analogy with the solar case suggests a revised identification of the dynamo mechanisms that are responsible for the so-called “active” and “inactive” sequences as proposed by Böhm-Vitense. Finally, based on the observed properties of ǫ Eri we argue that the rotational history of the Sun is what makes it an outlier in the context of magnetic cycles observed in other stars (as also suggested by its Li depletion), and that a Jovian-mass companion cannot be the universal explanation for the solar peculiarities.Fil: Metcalfe, T. S.. Space Science Institute; Estados UnidosFil: 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: Brown, B. P.. University Of Wisconsin; Estados UnidosFil: Mathur, S.. Space Science Institute; Estados Unidos. High Altitude Observatory, NCAR; Estados UnidosFil: Soderblom, D. R.. Space Telescope Science Institute; Estados UnidosFil: Henry, T. J.. Georgia State University; Estados UnidosFil: 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; ArgentinaFil: Petrucci, Romina 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. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Complejo Astronómico "el Leoncito". Universidad Nacional de Córdoba. Complejo Astronómico ; ArgentinaFil: Hall, J. C.. Lowell Observatory; Estados UnidosFil: Basu, S.. University Of Yale; Estados UnidosIOP Publishing2013-02-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/17059Metcalfe, T. S.; Buccino, Andrea Paola; Brown, B. P.; Mathur, S.; Soderblom, D. R.; et al.; Magnetic Activity Cycles in the Exoplanet Host Star ǫ Eridani; IOP Publishing; The Astrophysical Journal Letters; 763; 2; 1-2-2013; L26, 1-62041-8205enginfo:eu-repo/semantics/altIdentifier/url/http://iopscience.iop.org/article/10.1088/2041-8205/763/2/L26/metainfo:eu-repo/semantics/altIdentifier/doi/10.1088/2041-8205/763/2/L26info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T11:04:31Zoai:ri.conicet.gov.ar:11336/17059instacron: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 11:04:32.026CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Magnetic Activity Cycles in the Exoplanet Host Star ǫ Eridani
title Magnetic Activity Cycles in the Exoplanet Host Star ǫ Eridani
spellingShingle Magnetic Activity Cycles in the Exoplanet Host Star ǫ Eridani
Metcalfe, T. S.
Stars: Activity
Stars: Chromospheres
Stars: Individual(Hd 22049)
Surveys
title_short Magnetic Activity Cycles in the Exoplanet Host Star ǫ Eridani
title_full Magnetic Activity Cycles in the Exoplanet Host Star ǫ Eridani
title_fullStr Magnetic Activity Cycles in the Exoplanet Host Star ǫ Eridani
title_full_unstemmed Magnetic Activity Cycles in the Exoplanet Host Star ǫ Eridani
title_sort Magnetic Activity Cycles in the Exoplanet Host Star ǫ Eridani
dc.creator.none.fl_str_mv Metcalfe, T. S.
Buccino, Andrea Paola
Brown, B. P.
Mathur, S.
Soderblom, D. R.
Henry, T. J.
Mauas, Pablo Jacobo David
Petrucci, Romina Paola
Hall, J. C.
Basu, S.
author Metcalfe, T. S.
author_facet Metcalfe, T. S.
Buccino, Andrea Paola
Brown, B. P.
Mathur, S.
Soderblom, D. R.
Henry, T. J.
Mauas, Pablo Jacobo David
Petrucci, Romina Paola
Hall, J. C.
Basu, S.
author_role author
author2 Buccino, Andrea Paola
Brown, B. P.
Mathur, S.
Soderblom, D. R.
Henry, T. J.
Mauas, Pablo Jacobo David
Petrucci, Romina Paola
Hall, J. C.
Basu, S.
author2_role author
author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Stars: Activity
Stars: Chromospheres
Stars: Individual(Hd 22049)
Surveys
topic Stars: Activity
Stars: Chromospheres
Stars: Individual(Hd 22049)
Surveys
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 active K2 dwarf ǫ Eri has been extensively characterized, both as a young solar analog and more recently as an exoplanet host star. As one of the nearest and brightest stars in the sky, it provides an unparalleled opportunity to constrain stellar dynamo theory beyond the Sun. We confirm and document the 3 year magnetic activity cycle in ǫ Eri originally reported by Hatzes and coworkers, and we examine the archival data from previous observations spanning 45 years. The data show coexisting 3 year and 13 year periods leading into a broad activity minimum that resembles a Maunder minimum-like state, followed by the resurgence of a coherent 3 year cycle. The nearly continuous activity record suggests the imultaneous operation of two stellar dynamos with cycle periods of 2.95 ± 0.03 years and 12.7 ± 0.3 years, which by analogy with the solar case suggests a revised identification of the dynamo mechanisms that are responsible for the so-called “active” and “inactive” sequences as proposed by Böhm-Vitense. Finally, based on the observed properties of ǫ Eri we argue that the rotational history of the Sun is what makes it an outlier in the context of magnetic cycles observed in other stars (as also suggested by its Li depletion), and that a Jovian-mass companion cannot be the universal explanation for the solar peculiarities.
Fil: Metcalfe, T. S.. Space Science Institute; Estados Unidos
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: Brown, B. P.. University Of Wisconsin; Estados Unidos
Fil: Mathur, S.. Space Science Institute; Estados Unidos. High Altitude Observatory, NCAR; Estados Unidos
Fil: Soderblom, D. R.. Space Telescope Science Institute; Estados Unidos
Fil: Henry, T. J.. Georgia State University; Estados Unidos
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
Fil: Petrucci, Romina 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. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Complejo Astronómico "el Leoncito". Universidad Nacional de Córdoba. Complejo Astronómico ; Argentina
Fil: Hall, J. C.. Lowell Observatory; Estados Unidos
Fil: Basu, S.. University Of Yale; Estados Unidos
description The active K2 dwarf ǫ Eri has been extensively characterized, both as a young solar analog and more recently as an exoplanet host star. As one of the nearest and brightest stars in the sky, it provides an unparalleled opportunity to constrain stellar dynamo theory beyond the Sun. We confirm and document the 3 year magnetic activity cycle in ǫ Eri originally reported by Hatzes and coworkers, and we examine the archival data from previous observations spanning 45 years. The data show coexisting 3 year and 13 year periods leading into a broad activity minimum that resembles a Maunder minimum-like state, followed by the resurgence of a coherent 3 year cycle. The nearly continuous activity record suggests the imultaneous operation of two stellar dynamos with cycle periods of 2.95 ± 0.03 years and 12.7 ± 0.3 years, which by analogy with the solar case suggests a revised identification of the dynamo mechanisms that are responsible for the so-called “active” and “inactive” sequences as proposed by Böhm-Vitense. Finally, based on the observed properties of ǫ Eri we argue that the rotational history of the Sun is what makes it an outlier in the context of magnetic cycles observed in other stars (as also suggested by its Li depletion), and that a Jovian-mass companion cannot be the universal explanation for the solar peculiarities.
publishDate 2013
dc.date.none.fl_str_mv 2013-02-01
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/11336/17059
Metcalfe, T. S.; Buccino, Andrea Paola; Brown, B. P.; Mathur, S.; Soderblom, D. R.; et al.; Magnetic Activity Cycles in the Exoplanet Host Star ǫ Eridani; IOP Publishing; The Astrophysical Journal Letters; 763; 2; 1-2-2013; L26, 1-6
2041-8205
url http://hdl.handle.net/11336/17059
identifier_str_mv Metcalfe, T. S.; Buccino, Andrea Paola; Brown, B. P.; Mathur, S.; Soderblom, D. R.; et al.; Magnetic Activity Cycles in the Exoplanet Host Star ǫ Eridani; IOP Publishing; The Astrophysical Journal Letters; 763; 2; 1-2-2013; L26, 1-6
2041-8205
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://iopscience.iop.org/article/10.1088/2041-8205/763/2/L26/meta
info:eu-repo/semantics/altIdentifier/doi/10.1088/2041-8205/763/2/L26
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
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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score 12.982451

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