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Una relación edad-color para los asteroides del cinturón principal del complejo S
Robert Jedicke1, David Nesvorný, Robert Whiteley
1Institute for Astronomy, University of Hawaii, Honolulu, Hawaii 96822, USA. jedicke@ifa.hawaii.edu
Nature
|May 21, 2004
Resumen
El clima espacial altera las superficies de los asteroides, lo que explica por qué los espectros de los meteoritos difieren de sus cuerpos progenitores. Este estudio cuantifica las tasas de intemperie espacial en los asteroides del complejo S, vinculándolos a las condritas ordinarias.
Área de la Ciencia:
- Ciencias planetarias Ciencias planetarias.
- La astronomía es la astronomía.
- Geología Geología Geología.
Sus antecedentes:
- Las colisiones de asteroides expulsan fragmentos que se convierten en meteoritos.
- Los espectros de los meteoritos de condritas ordinarias (OC) no coinciden con los asteroides del complejo S.
- La intemperie espacial es una explicación propuesta para las diferencias espectrales.
Objetivo del estudio:
- Cuantificar la velocidad de la intemperie espacial en los asteroides del complejo S.
- Investigar la relación genética entre los asteroides del complejo S y los meteoritos OC.
Principales métodos:
- Analizó la relación entre las edades de las familias de asteroides y sus colores.
- Datos extrapolados por edad-color a edades más jóvenes.
Principales resultados:
- Se midió la velocidad de la intemperie espacial en los asteroides del complejo S.
- La relación extrapolada edad-color coincidía con el color de las muestras frescas de meteoritos OC.
Conclusiones:
- Una fuerte evidencia apoya un vínculo genético entre los asteroides del complejo S y los meteoritos OC.
- La intemperie espacial es un proceso clave para modificar las superficies de los asteroides y explicar los orígenes de los meteoritos.
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