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
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/17059
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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 Técnicas2025-09-29T09:36:25Zoai: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:34982025-09-29 09:36:25.87CONICET 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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13.070432 |