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La rápida desaparición de un disco circumestelar cálido y polvoriento
Carl Melis1, B Zuckerman, Joseph H Rhee
1Center for Astrophysics and Space Sciences, University of California, San Diego, California 92093-0424, USA. cmelis@ucsd.edu
Nature
|July 6, 2012
Resumen
Las observaciones revelan una estrella joven.
Área de la Ciencia:
- La astronomía y la astrofísica.
- Ciencias planetarias Ciencias planetarias.
Sus antecedentes:
- Las estrellas se forman con envolturas de polvo que evolucionan en sistemas planetarios.
- Comprender la evolución del disco es clave para las teorías de formación de planetas.
- La formación de planetas rocosos implica la acumulación de objetos por colisión.
Objetivo del estudio:
- Investigar la evolución de las eyecciones post-colisión en el disco de una estrella joven.
- Observe los rápidos cambios en el material polvoriento alrededor de una estrella similar al Sol.
- Prueba los modelos físicos actuales de la formación de planetas.
Principales métodos:
- Observaciones de flujo infrarrojo de la joven estrella TYC 8241-2652-1.
- El monitoreo de cambios en un período de menos de dos años.
Principales resultados:
- Se observó una disminución drástica (factor de ~30) en el flujo infrarrojo de las eyecciones post-colisión.
- El disco de la estrella pasó de ser una substancial expulsión de polvo a un polvo más frío y mínimo.
- Esta fase de evolución rápida fue previamente impredecible y no observada.
Conclusiones:
- Los modelos físicos actuales no explican adecuadamente la evolución rápida observada de las eyecciones.
- Este hallazgo desafía las teorías existentes sobre la formación de planetas y la evolución del disco.
- Se necesita más investigación para comprender estos rápidos procesos de disipación del polvo.
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