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La binariedad de una protoestrella afecta la evolución del disco y los planetas
Jes K Jørgensen1, Rajika L Kuruwita2, Daniel Harsono3,4
1Niels Bohr Institute, University of Copenhagen, Copenhagen K., Denmark. jeskj@nbi.ku.dk.
Nature
|May 23, 2022
Resumen
Los sistemas estelares binarios tienen un impacto significativo en la formación de estrellas y planetas. La acreción episódica en estos sistemas impulsa chorros tambaleantes, afectando la evolución del disco protoplanetario y los sistemas planetarios potenciales.
Área de la Ciencia:
- La astronomía
- La astrofísica
- Evolución estelar
Sus antecedentes:
- Casi la mitad de las estrellas similares al Sol existen en sistemas binarios o múltiples.
- Los sistemas protoestelares jóvenes, como NGC 1333-IRAS2A, son cruciales para comprender la evolución estelar y planetaria temprana.
- NGC 1333-IRAS2A exhibe flujos bipolares perpendiculares y es un sistema binario conocido (VLA1 y VLA2).
Objetivo del estudio:
- Para investigar el impacto de los sistemas estelares binarios en la evolución protostellar.
- Para analizar las estructuras físicas y químicas de los discos protoplanetarios en sistemas binarios.
- Para comparar los datos de observación con las simulaciones magnetohidrodinámicas.
Principales métodos:
- Observaciones de especies moleculares con resolución espacial y espectral.
- Simulaciones magnetohidrodinámicas (MHD) detalladas.
- Comparación de los datos de observación con los resultados de la simulación.
Principales resultados:
- La acreción inhomogénea en los discos circumestelares ocurre en ráfagas episódicas.
- La acreción episódica impulsa un chorro tambaleante.
- La binariedad influye fuertemente en las propiedades de las estrellas emergentes y en las estructuras del disco protoplanetario.
Conclusiones:
- Los sistemas estelares binarios y múltiples afectan significativamente la formación de estrellas y planetas.
- Los fenómenos observados en NGC 1333-IRAS2A son consistentes con la acreción episódica en un sistema binario.
- Comprender estos procesos es vital para comprender la formación de los sistemas planetarios.
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