Interação estrela planeta: sobre o magnetismo de planetas gigantes gasosos
In this thesis we analyze the effects that the presence of a near gas giant planet can cause in its host star. It has been argued that the star planet interaction can cause changes in the coronal and chromospheric stellar activity. With this in mind, we analyze a sample of 53 extrasolar planets orbi...
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| Formato: | doctoralThesis |
| Idioma: | por |
| Publicado em: |
Universidade Federal do Rio Grande do Norte
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| Endereço do item: | https://repositorio.ufrn.br/jspui/handle/123456789/16620 |
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| Resumo: | In this thesis we analyze the effects that the presence of a near gas giant planet can
cause in its host star. It has been argued that the star planet interaction can cause
changes in the coronal and chromospheric stellar activity. With this in mind, we analyze
a sample of 53 extrasolar planets orbiting F, G and K main sequence stars, among
them three super-Earths. In this analysis, we look for evidence of changes in the
chromospheric activity due to the proximity of the giant planet. We show that, so far,
there is not enough evidence to support such a hypothesis. Making use of the same
sample and also taking in account available data for the Solar System, we revisit the
so-called magnetic Bode s law. This law proposes the existence of a direct relationship
between magnetism and rotation. By using estimations for the stellar and planetary
magnetic momentM and the angular momentumL, we construct a Blackett s diagram
(logL 􀀀logM). In this diagram is evident that the magnetic Bode s law is valid for both
the Solar System and the new planetary systems |
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