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Un sistema de anillos detectado alrededor del Centauro (10199) Chariklo.
F Braga-Ribas1, B Sicardy2, J L Ortiz3
1Observatório Nacional/MCTI, Rua General José Cristino 77, CEP 20921-400 Rio de Janeiro, RJ, Brazil.
Nature
|March 28, 2014
Resumen
Los astrónomos descubrieron un sistema de anillos alrededor del Centauro (10199) Chariklo, un pequeño cuerpo del Sistema Solar. Estos anillos, compuestos en parte de hielo de agua, pueden ser restos de un disco de escombros confinado por satélites.
Área de la Ciencia:
- Ciencias planetarias Ciencias planetarias.
- La astronomía es la astronomía.
- Investigación de Cuerpo Pequeño.
Sus antecedentes:
- Los sistemas de anillos eran previamente conocidos sólo alrededor de los planetas gigantes del Sistema Solar.
- Los anillos sirven como laboratorios naturales cruciales para estudiar la formación y evolución de los sistemas planetarios.
- Los objetos del centauro, como (10199) Chariklo, son cuerpos pequeños que orbitan entre Júpiter y Neptuno.
Objetivo del estudio:
- Investigar las características físicas y la composición del sistema (10199) Chariklo.
- Comprender el origen y las implicaciones evolutivas de los sistemas de anillos alrededor de cuerpos celestes más pequeños.
Principales métodos:
- Realizó una observación de ocultación estelar de múltiples cuerdas de (10199) Chariklo.
- Análisis de datos espectrales para identificar las características de absorción y evaluar la composición de la superficie.
Principales resultados:
- Detectado un sistema de anillos compacto alrededor de (10199) Chariklo, con dos anillos densos (7 km y 3 km de ancho).
- Determinación de los radios orbitales del anillo a 391 km y 405 km, con profundidades ópticas de 0,4 y 0,06.
- Los cambios observados en el espectro y el brillo de Chariklo son consistentes con una orientación de borde en el anillo y la composición del hielo de agua.
Conclusiones:
- El descubrimiento de anillos alrededor de Chariklo expande la población conocida de cuerpos celestes anillados más allá de los planetas gigantes.
- Es probable que los anillos estén compuestos en parte de hielo de agua y puedan ser restos de un disco de escombros.
- Los satélites incrustados de un kilómetro de tamaño se proponen como un mecanismo para confinar estos anillos recién descubiertos.
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