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La interrupción de los sistemas multiplanetarios a través de la resonancia con una órbita binaria

Jihad R Touma¹, S Sridhar²

¹Department of Physics, American University of Beirut, PO Box 11-0236, Riad El-Solh, Beirut 1107 2020, Lebanon.

|August 28, 2015

Resumen

La conducción de resonancia binaria puede excitar grandes excentricidades e inclinaciones planetarias, o incluso interrumpir los sistemas. Este mecanismo genérico, que afecta a los sistemas exoplanetarios en estrellas binarias, no requiere condiciones especiales.

Área de la Ciencia:

La astronomía
La astrofísica
Ciencias exoplanetarias

Sus antecedentes:

La mayoría de los sistemas exoplanetarios en estrellas binarias son de tipo S, con planetas orbitando una estrella en un amplio sistema binario.
Las excentricidades e inclinaciones planetarias pueden ser significativas, potencialmente impulsadas por las interacciones gravitacionales con el compañero binario.
La inestabilidad de Kozai-Lidov fue invocada anteriormente para explicar grandes oscilaciones en sistemas de un solo planeta.

Objetivo del estudio:

Para investigar el impacto de la precesión orbital en los sistemas planetarios dentro de las estrellas binarias.
Explorar el fenómeno del forzamiento binario resonante y sus consecuencias para las arquitecturas de exoplanetas.
Para determinar si las interacciones de resonancia pueden ocurrir entre la precesión orbital en sistemas multiplanetarios y compañeros binarios distantes.

Principales métodos:

Simulaciones de sistemas exoplanetarios en estrellas binarias, considerando las interacciones multiplanetarias y la precesión orbital.
Análisis de cómo la precesión orbital puede sincronizarse con el movimiento orbital de un compañero binario distante.
Modelado de los efectos del forzamiento binario resonante en la dinámica orbital planetaria.

Principales resultados:

La precesión orbital en sistemas multiplanetarios puede llegar a ser lo suficientemente rápida como para resonar con un compañero binario distante.
El forzamiento binario de resonancia conduce a resultados dramáticos, incluyendo grandes excentricidades planetarias, inclinaciones mutuas y interrupción del sistema.
La migración planetaria puede llevar a los sistemas inicialmente no resonantes a la resonancia.

Conclusiones:

La conducción de resonancia binaria es un mecanismo genérico que puede alterar significativamente la arquitectura de los sistemas multiplanetarios.
Este fenómeno puede explicar las tasas de ocurrencia observadas de planetas en amplios sistemas binarios.
El forzamiento binario resonante también puede influir en los procesos de formación de planetas, particularmente en sistemas binarios cercanos.

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