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dc.contributor.author
Villarreal D'angelo, Carolina Susana
dc.contributor.author
Esquivel Salazar, José Alejandro
dc.contributor.author
Schneiter, Ernesto Matías
dc.contributor.author
Sgró, Mario Agustín
dc.date.available
2019-10-22T18:00:21Z
dc.date.issued
2018-09
dc.identifier.citation
Villarreal D'angelo, Carolina Susana; Esquivel Salazar, José Alejandro; Schneiter, Ernesto Matías; Sgró, Mario Agustín; Magnetized winds and their influence in the escaping upper atmosphere of HD 209458b; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society; 479; 3; 9-2018; 3115-3125
dc.identifier.issn
0035-8711
dc.identifier.uri
http://hdl.handle.net/11336/86936
dc.description.abstract
Lyman a observations during an exoplanet transit have proved to be very useful to study the interaction between the stellar wind and the planetary atmosphere. They have been extensively used to constrain planetary system parameters that are not directly observed, such as the planetary mass-loss rate. In this way, Ly α observations can be a powerful tool to infer the existence of a planetarymagnetic field, since it is expected that the latterwill affect the escaping planetary material. To explore the effect that magnetic fields have on the Ly α absorption of HD 209458b, we run a set of 3D MHD simulations including dipolar magnetic fields for the planet and the star. We assume values for the surface magnetic field at the poles of the planet in the range of [0-5] G, and from 1 to 5 G at the poles of the star. Our models also include collisional and photo-ionization, radiative recombination, and an approximation for the radiation pressure. Our results show that the magnetic field of the planet and the star change the shape of the Ly α absorption profile, since it controls the extent of the planetary magnetosphere and the amount of neutralmaterial inside it. Themodel that best reproduces the absorption observed in HD 209458b (with canonical values for the stellar wind parameters) corresponds to a dipole planetary field of ≲ 1 G at the poles.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Wiley Blackwell Publishing, Inc
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
MHD-METHODS: NUMERICAL
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PLANET-STAR INTERACTIONS
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PLANETS AND SATELLITES: GENERAL
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PLANETS AND SATELLITES: INDIVIDUAL: HD 209458B
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STARS: WINDS, OUTFLOWS
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Otras Ciencias Naturales y Exactas
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Otras Ciencias Naturales y Exactas
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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Otras Ciencias Físicas
dc.subject.classification
Ciencias Físicas
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
dc.title
Magnetized winds and their influence in the escaping upper atmosphere of HD 209458b
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2019-10-17T15:19:21Z
dc.identifier.eissn
1365-2966
dc.journal.volume
479
dc.journal.number
3
dc.journal.pagination
3115-3125
dc.journal.pais
Reino Unido
dc.journal.ciudad
Londres
dc.description.fil
Fil: Villarreal D'angelo, Carolina Susana. University of St. Andrews; Reino Unido
dc.description.fil
Fil: Esquivel Salazar, José Alejandro. Universidad Nacional Autónoma de México. Instituto de Ciencias Nucleares; México
dc.description.fil
Fil: Schneiter, Ernesto Matías. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Astronomía Teórica y Experimental. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba. Instituto de Astronomía Teórica y Experimental; Argentina
dc.description.fil
Fil: Sgró, Mario Agustín. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Astronomía Teórica y Experimental. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba. Instituto de Astronomía Teórica y Experimental; Argentina
dc.journal.title
Monthly Notices of the Royal Astronomical Society
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/mnras/article/479/3/3115/5035846
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/https://doi.org/10.1093/mnras/sty1544
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