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El amanecer en Vesta: prueba del paradigma protoplanetario
C T Russell1, C A Raymond, A Coradini
1Institute of Geophysics and Planetary Physics, University of California, Los Angeles, CA 90095-1567, USA. ctrussell@igpp.ucla.edu
Science (New York, N.Y.)
|May 15, 2012
Resumen
La nave espacial Dawn confirmó que el protoplaneta Vesta, una fuente de meteoritos de howardita-eucrita-diogenita (HED), es un cuerpo diferenciado. Sus observaciones revelaron una gran cuenca de impacto y una mineralogía de superficie consistente con un origen fundido y condrítico.
Área de la Ciencia:
- Ciencias planetarias Ciencias planetarias.
- Ciencia de los asteroides Ciencia de los asteroides.
- Formación del sistema solar Formación del sistema solar
Sus antecedentes:
- 4 Vesta es considerado un protoplaneta intacto del sistema solar temprano.
- Los meteoritos Howardita-eucrita-diogenita (HED) sugieren un cuerpo progenitor diferenciado.
- La misión Dawn tenía como objetivo estudiar las características de Vesta.
Objetivo del estudio:
- Investigar la diferenciación y la composición de 4 Vesta.
- Para confirmar que Vesta es el cuerpo padre de los meteoritos HED.
- Para entender la evolución del sistema solar temprano a través del estudio de Vesta.
Principales métodos:
- Análisis de los datos de la nave espacial Dawn. análisis de los datos de la nave espacial Dawn. análisis de los datos de la nave espacial Dawn.
- Mapeo mineralógico de la superficie de Vesta con resolución espacial.
- Campo gravitacional y mediciones físicas (masa, volumen).
Principales resultados:
- Descubrimiento de una cuenca de impacto gigante en el polo sur de Vesta.
- La mineralogía de la superficie coincide con la composición del meteorito HED.
- Las propiedades físicas de Vesta indican un núcleo diferenciado (107-113 km de radio).
Conclusiones:
- Los hallazgos de Dawn confirman la diferenciación de Vesta.
- Se confirma que Vesta es el cuerpo padre de los meteoritos HED.
- El estudio apoya el papel de Vesta en la comprensión de los primeros procesos del sistema solar.
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