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Subestructura en el disco circumestelar alrededor de la joven estrella AU Microscopii
1Institute for Astronomy, University of Hawaii, 2680 Woodlawn Drive, Honolulu, HI 96822, USA. mliu@ifa.hawaii.edu
Science (New York, N.Y.)
|August 17, 2004
Resumen
Las imágenes de alta resolución revelan el disco interno de AU Microscopii (AU Mic), el disco de luz dispersa más cercano a la Tierra. Su estructura asimétrica y sus características localizadas sugieren una formación planetaria en curso y una evolución sincrónica con el disco beta Pictoris.
Área de la Ciencia:
- La astronomía es la astronomía.
- La astrofísica es la astrofísica.
- Ciencias planetarias Ciencias planetarias.
Sus antecedentes:
- AU Microscopii (AU Mic) alberga el disco de luz dispersa conocido más cercano a la Tierra.
- La comprensión de la evolución del disco circumestelar proporciona información sobre la formación de los planetas.
Objetivo del estudio:
- Para resolver y caracterizar la estructura del disco interno de AU Microscopii utilizando técnicas avanzadas de imagen.
- Para investigar la morfología del disco AU Mic en busca de evidencia de la subestructura y la influencia planetaria.
Principales métodos:
- Utilizó imágenes de óptica adaptativa Keck para lograr una resolución física de 0,4 unidades astronómicas (UA).
- Se analizó el disco interno de AU Mic, que abarca distancias radiales de 15 a 80 UA.
Principales resultados:
- Resolvió el disco interno de AU Mic, revelando una estructura asimétrica con un cambio distinto a 35 UA.
- Identificó mejoras y déficits espacialmente localizados en el disco entre 25 y 40 UA.
- Características morfológicas observadas indicativas de cuerpos más grandes no vistos y formación reciente de planetas.
Conclusiones:
- La estructura del disco interno de AU Mic sugiere procesos de formación planetaria en curso.
- Las similitudes entre AU Mic y el disco beta Pictoris indican una evolución sincrónica en los discos circumestelares jóvenes.
- La subestructura parece ser una característica común de los discos circumestelares de alrededor de 12 millones de años.
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