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HD 181068: una gigante roja en un triple eclipse compacto jerárquico sistema triple
A Derekas1, L L Kiss, T Borkovits
1Department of Astronomy, Eötvös University, Budapest, Hungary. derekas@konkoly.hu
Science (New York, N.Y.)
|April 9, 2011
Resumen
Los sistemas triplos jerárquicos, como HD 181068, son clave para comprender la evolución de las estrellas. Este estudio revela una gigante roja con oscilaciones inducidas por las mareas debido a un compañero binario cercano.
Área de la Ciencia:
- La astronomía y la astrofísica.
- Física estelar Física estelar es la física estelar.
- Los sistemas exoplanetarios son sistemas exoplanetarios.
Sus antecedentes:
- Los sistemas triplos jerárquicos son cruciales para probar las teorías de formación y evolución estelar.
- Estos sistemas consisten en un par binario cercano y un componente estelar más distante.
Objetivo del estudio:
- Para analizar el sistema triple jerárquico HD 181068 utilizando extensos datos fotométricos y espectroscópicos.
- Investigar las interacciones dinámicas y los efectos de las mareas dentro del sistema.
Principales métodos:
- Adquisición de 218 días de fotometría de Kepler para HD 181068.8.
- Complementación con espectroscopia y interferometría basadas en tierra.
- Análisis de eclipses mutuos para determinar los parámetros orbitales y la configuración del sistema.
Principales resultados:
- HD 181068 confirmado como un sistema triple jerárquico.
- El sistema comprende una gigante roja en una órbita de 45 días con un binario cercano de 0.9 días de enanas rojas.
- Evidencia de oscilaciones inducidas por las mareas en la gigante roja, impulsadas por el movimiento del binario interno.
Conclusiones:
- HD 181068 sirve como un laboratorio ideal para estudiar la evolución dinámica en los sistemas de estrellas triples.
- El sistema ofrece una oportunidad única para probar las teorías de la fricción de las mareas y las interacciones estelares.
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