Is the activity level of HD 80606 influenced by its eccentric planet?
Autor(a) principal: | |
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Data de Publicação: | 2016 |
Outros Autores: | , , , , , , , , , , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10773/16177 |
Resumo: | Aims: Several studies suggest that the activity level of a planet-host star can be influenced by the presence of a close-by orbiting planet. Moreover, the interaction mechanisms that have been proposed, magnetic interaction and tidal interaction, exhibit a very different dependence on the orbital separation between the star and the planet. A detection of activity enhancement and characterization of its dependence on planetary orbital distance can, in principle, allow us to characterize the physical mechanism behind the activity enhancement. Methods: We used the HARPS-N spectrograph to measure the stellar activity level of HD 80606 during the planetary periastron passage and compared the activity measured to that close to apastron. Being characterized by an eccentricity of 0.93 and an orbital period of 111 days, the system's extreme variation in orbital separation makes it a perfect target to test our hypothesis. Results: We find no evidence for a variation in the activity level of the star as a function of planetary orbital distance, as measured by all activity indicators employed: log(R'HK), Hα, NaI, and HeI. None of the models employed, whether magnetic interaction or tidal interaction, provides a good description of the data. The photometry revealed no variation either, but it was strongly affected by poor weather conditions. Conclusions: We find no evidence for star-planet interaction in HD 80606 at the moment of the periastron passage of its very eccentric planet. The straightforward explanation for the non-detection is the absence of interaction as a result of a low magnetic field strength on either the planet or the star and of the low level of tidal interaction between the two. However, we cannot exclude two scenarios: i) the interaction can be instantaneous and of magnetic origin, being concentrated on the substellar point and its surrounding area; and ii) the interaction can lead to a delayed activity enhancement. In either scenario, a star-planet interaction would not be detectable with the dataset described in this paper. |
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Is the activity level of HD 80606 influenced by its eccentric planet?Stars: activityStars: individual: HD 80606Instrumentation: spectrographsTechniques: radial velocitiesTechniques: spectroscopicMethods: data analysisAims: Several studies suggest that the activity level of a planet-host star can be influenced by the presence of a close-by orbiting planet. Moreover, the interaction mechanisms that have been proposed, magnetic interaction and tidal interaction, exhibit a very different dependence on the orbital separation between the star and the planet. A detection of activity enhancement and characterization of its dependence on planetary orbital distance can, in principle, allow us to characterize the physical mechanism behind the activity enhancement. Methods: We used the HARPS-N spectrograph to measure the stellar activity level of HD 80606 during the planetary periastron passage and compared the activity measured to that close to apastron. Being characterized by an eccentricity of 0.93 and an orbital period of 111 days, the system's extreme variation in orbital separation makes it a perfect target to test our hypothesis. Results: We find no evidence for a variation in the activity level of the star as a function of planetary orbital distance, as measured by all activity indicators employed: log(R'HK), Hα, NaI, and HeI. None of the models employed, whether magnetic interaction or tidal interaction, provides a good description of the data. The photometry revealed no variation either, but it was strongly affected by poor weather conditions. Conclusions: We find no evidence for star-planet interaction in HD 80606 at the moment of the periastron passage of its very eccentric planet. The straightforward explanation for the non-detection is the absence of interaction as a result of a low magnetic field strength on either the planet or the star and of the low level of tidal interaction between the two. However, we cannot exclude two scenarios: i) the interaction can be instantaneous and of magnetic origin, being concentrated on the substellar point and its surrounding area; and ii) the interaction can lead to a delayed activity enhancement. In either scenario, a star-planet interaction would not be detectable with the dataset described in this paper.EDP Sciences2018-07-20T14:00:56Z2016-08-01T00:00:00Z2016-082017-08-01T15:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10773/16177eng0004-636110.1051/0004-6361/201628981Figueira, P.Santerne, A.Suárez Mascareño, A.Silva, J. G. daAbe, L.Adibekyan, V. Zh.Bendjoya, P.Correia, A. C. M.Delgado-Mena, E.Faria, J. P.Hebrard, G.Lovis, C.Oshagh, M.Rivet, J.-P.Santos, N. C.Suarez, O.Vidotto, A. A.info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2024-02-22T11:30:03Zoai:ria.ua.pt:10773/16177Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T02:51:20.950179Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Is the activity level of HD 80606 influenced by its eccentric planet? |
title |
Is the activity level of HD 80606 influenced by its eccentric planet? |
spellingShingle |
Is the activity level of HD 80606 influenced by its eccentric planet? Figueira, P. Stars: activity Stars: individual: HD 80606 Instrumentation: spectrographs Techniques: radial velocities Techniques: spectroscopic Methods: data analysis |
title_short |
Is the activity level of HD 80606 influenced by its eccentric planet? |
title_full |
Is the activity level of HD 80606 influenced by its eccentric planet? |
title_fullStr |
Is the activity level of HD 80606 influenced by its eccentric planet? |
title_full_unstemmed |
Is the activity level of HD 80606 influenced by its eccentric planet? |
title_sort |
Is the activity level of HD 80606 influenced by its eccentric planet? |
author |
Figueira, P. |
author_facet |
Figueira, P. Santerne, A. Suárez Mascareño, A. Silva, J. G. da Abe, L. Adibekyan, V. Zh. Bendjoya, P. Correia, A. C. M. Delgado-Mena, E. Faria, J. P. Hebrard, G. Lovis, C. Oshagh, M. Rivet, J.-P. Santos, N. C. Suarez, O. Vidotto, A. A. |
author_role |
author |
author2 |
Santerne, A. Suárez Mascareño, A. Silva, J. G. da Abe, L. Adibekyan, V. Zh. Bendjoya, P. Correia, A. C. M. Delgado-Mena, E. Faria, J. P. Hebrard, G. Lovis, C. Oshagh, M. Rivet, J.-P. Santos, N. C. Suarez, O. Vidotto, A. A. |
author2_role |
author author author author author author author author author author author author author author author author |
dc.contributor.author.fl_str_mv |
Figueira, P. Santerne, A. Suárez Mascareño, A. Silva, J. G. da Abe, L. Adibekyan, V. Zh. Bendjoya, P. Correia, A. C. M. Delgado-Mena, E. Faria, J. P. Hebrard, G. Lovis, C. Oshagh, M. Rivet, J.-P. Santos, N. C. Suarez, O. Vidotto, A. A. |
dc.subject.por.fl_str_mv |
Stars: activity Stars: individual: HD 80606 Instrumentation: spectrographs Techniques: radial velocities Techniques: spectroscopic Methods: data analysis |
topic |
Stars: activity Stars: individual: HD 80606 Instrumentation: spectrographs Techniques: radial velocities Techniques: spectroscopic Methods: data analysis |
description |
Aims: Several studies suggest that the activity level of a planet-host star can be influenced by the presence of a close-by orbiting planet. Moreover, the interaction mechanisms that have been proposed, magnetic interaction and tidal interaction, exhibit a very different dependence on the orbital separation between the star and the planet. A detection of activity enhancement and characterization of its dependence on planetary orbital distance can, in principle, allow us to characterize the physical mechanism behind the activity enhancement. Methods: We used the HARPS-N spectrograph to measure the stellar activity level of HD 80606 during the planetary periastron passage and compared the activity measured to that close to apastron. Being characterized by an eccentricity of 0.93 and an orbital period of 111 days, the system's extreme variation in orbital separation makes it a perfect target to test our hypothesis. Results: We find no evidence for a variation in the activity level of the star as a function of planetary orbital distance, as measured by all activity indicators employed: log(R'HK), Hα, NaI, and HeI. None of the models employed, whether magnetic interaction or tidal interaction, provides a good description of the data. The photometry revealed no variation either, but it was strongly affected by poor weather conditions. Conclusions: We find no evidence for star-planet interaction in HD 80606 at the moment of the periastron passage of its very eccentric planet. The straightforward explanation for the non-detection is the absence of interaction as a result of a low magnetic field strength on either the planet or the star and of the low level of tidal interaction between the two. However, we cannot exclude two scenarios: i) the interaction can be instantaneous and of magnetic origin, being concentrated on the substellar point and its surrounding area; and ii) the interaction can lead to a delayed activity enhancement. In either scenario, a star-planet interaction would not be detectable with the dataset described in this paper. |
publishDate |
2016 |
dc.date.none.fl_str_mv |
2016-08-01T00:00:00Z 2016-08 2017-08-01T15:00:00Z 2018-07-20T14:00:56Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10773/16177 |
url |
http://hdl.handle.net/10773/16177 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
0004-6361 10.1051/0004-6361/201628981 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
EDP Sciences |
publisher.none.fl_str_mv |
EDP Sciences |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
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RCAAP |
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RCAAP |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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