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Un cometa binario del cinturón principal
Jessica Agarwal1, David Jewitt2,3, Max Mutchler4
1Max Planck Institute for Solar System Research, Justus-von-Liebig Weg 3, 37077 Göttingen, Germany.
Nature
|September 22, 2017
Resumen
El asteroide 288P es un cometa binario único del cinturón principal, que exhibe una actividad similar a la de los cometas impulsada por la sublimación. Este descubrimiento pone de relieve el papel significativo de los torques de sublimación en la configuración de las órbitas binarias de los asteroides.
Área de la Ciencia:
- La astronomía
- Ciencias planetarias
- Dinámica del sistema solar
Sus antecedentes:
- Los asteroides evolucionan a través de colisiones y interrupciones de rotación, formando binarios y liberando polvo.
- Los cometas del cinturón principal muestran actividad transitoria debido a la sublimación de volátiles excavados.
- Los pares de sublimación influyen en las velocidades de giro del cometa activo y pueden causar la división del núcleo.
Objetivo del estudio:
- Para investigar la naturaleza del asteroide activo del cinturón principal 288P.
- Para determinar si 288P es un sistema binario y entender su mecanismo de actividad.
- Para explorar las implicaciones de los torques de sublimación en la evolución de los asteroides binarios.
Principales métodos:
- Astronomía observacional para estudiar la actividad y las características del asteroide 288P.
- Análisis de la dinámica orbital y las propiedades físicas de los componentes del asteroide.
- Comparación con los modelos de actividad de asteroides y cometas conocidos.
Principales resultados:
- El asteroide 288P ha sido confirmado como un cometa binario del cinturón principal.
- Muestra características inusuales: amplia separación, tamaño casi igual de los componentes y alta excentricidad.
- Las observaciones apoyan firmemente la sublimación como el motor de la actividad de 288P.
Conclusiones:
- 288P representa un nuevo tipo de sistema de asteroides binarios.
- La sublimación es un factor clave en su actividad observada.
- Los torques de sublimación son significativos en la evolución orbital de los asteroides binarios.
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