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Júpiter calientes de las interacciones planetas-planetas seculares.

Smadar Naoz1, Will M Farr, Yoram Lithwick

  • 1Center for Interdisciplinary Exploration and Research in Astrophysics, Northwestern University, Evanston, Illinois 60208, USA. snaoz@northwestern.edu

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|May 13, 2011
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Resumen

Los perturbadores planetarios pueden hacer que los Júpiter calientes orbiten alrededor de las estrellas en direcciones retrógradas. Esto ocurre a través de complejas interacciones gravitacionales y fuerzas de marea, lo que lleva a configuraciones inusuales del sistema planetario.

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Área de la Ciencia:

  • La astronomía y la astrofísica.
  • Ciencia exoplanetaria Ciencia de los exoplanetas.
  • La Dinámica Orbital es una Dinámica Orbital.

Sus antecedentes:

  • Los Júpiter calientes son gigantes gaseosos que orbitan cerca de sus estrellas.
  • Algunos Júpiter calientes exhiben órbitas retrógradas, contrarias a la rotación de su estrella.
  • Los modelos existentes luchan por explicar las órbitas retrógradas en relación con el momento angular total del sistema.

Objetivo del estudio:

  • Para investigar los mecanismos para la formación de Júpiter calientes con órbitas retrógradas.
  • Para explorar el papel de los perturbadores planetarios en la evolución orbital.
  • Para analizar el impacto de los efectos octupolares y la fricción de las mareas.

Principales métodos:

  • Simulaciones de perturbaciones seculares en sistemas jerárquicos de estrellas triples con cuerpos planetarios.
  • Incorporó efectos de orden octupolar y fricción de marea.
  • Se analizaron los cambios en el componente de momento angular de la órbita interna.

Principales resultados:

  • Demostró que los perturbadores planetarios pueden crear Júpiter calientes retrógrados.
  • Se demostró que el momento angular de la órbita interior puede cambiar de signo.
  • Identificó la evolución caótica y la circularización de las mareas como procesos clave.

Conclusiones:

  • Los perturbadores planetarios, a diferencia de los compañeros estelares distantes, pueden inducir órbitas retrógradas.
  • Las interacciones de las mareas circulan rápidamente las órbitas después de excursiones de alta excentricidad.
  • Este mecanismo explica la formación de los Júpiter calientes retrógrados.