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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
Nature
|May 13, 2011
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.
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.
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