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Movilidad del semieje mayor de los fragmentos de asteroides.
1Dipartimento di Astronomia, Universita di Trieste, Via Tiepolo 11, I-34131 Trieste, Italy. Institute of Astronomy, Charles University, V Holesovickach 2, CZ-18000 Prague 8, Czech Republic.
Science (New York, N.Y.)
|March 5, 1999
Resumen
El efecto Yarkovsky hace que las órbitas de los asteroides se desvíen, moviéndolos hacia vías de resonancia. Este sutil mecanismo de presión de radiación es crucial para llevar asteroides al espacio cercano a la Tierra.
Área de la Ciencia:
- * Dinámica de los asteroides y mecánica orbital.
- * Evolución del sistema solar y poblaciones de objetos cercanos a la Tierra (NEO).
Sus antecedentes:
- * Los asteroides experimentan sutiles fuerzas no gravitacionales, como el efecto Yarkovsky, debido a la presión de la radiación solar.
- * El efecto Yarkovsky influye en los semiejes mayores orbitales de los asteroides, particularmente aquellos de hasta 20 km de diámetro.
- * Durante millones de años, esta deriva puede alterar significativamente las trayectorias de los asteroides.
Objetivo del estudio:
- * Para investigar el papel del efecto Yarkovsky en la evolución orbital de los asteroides.
- * Comprender sus implicaciones para el transporte de asteroides del cinturón principal al espacio cercano a la Tierra.
- * Explorar cómo la deriva de Yarkovsky afecta el agrupamiento de asteroides y la dinámica de la población.
Principales métodos:
- * Análisis de la dinámica orbital de los asteroides, centrándose en la deriva del semieje mayor.
- * Modelado de la influencia del efecto Yarkovsky en las trayectorias de los asteroides en escalas de tiempo largas.
- * Investigando las vías de resonancia y su papel en el transporte de asteroides.
Principales resultados:
- * El efecto Yarkovsky hace que los semiejes mayores de los asteroides (de 1 a 10 km de radio) se desplacen por centésimas de una unidad astronómica durante sus vidas de colisión.
- * Esta deriva es un mecanismo primario para inyectar asteroides del cinturón principal en órbitas que cruzan Marte, poblando el espacio cercano a la Tierra.
- * Sin la deriva de Yarkovsky, la población de asteroides que cruzan Marte se agotaría mucho más rápido que la edad del sistema solar.
Conclusiones:
- * El efecto Yarkovsky es esencial para mantener la población observada de asteroides cercanos a la Tierra.
- * Este mecanismo explica la entrega de asteroides del cinturón principal a órbitas que cruzan la Tierra.
- * La movilidad orbital inducida por Yarkovsky también puede ser observable en los cúmulos de asteroides diseminados formados por colisiones.
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