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Imágenes de un cuarto planeta orbitando HR 879999
Christian Marois1, B Zuckerman, Quinn M Konopacky
1National Research Council Canada, Herzberg Institute of Astrophysics, 5071 West Saanich Road, Victoria, British Columbia V9E 2E7, Canada. christian.marois@nrc-cnrc.gc.ca
Nature
|December 15, 2010
Resumen
Los astrónomos descubrieron un cuarto planeta gigante que orbita alrededor de la estrella HR 8799.9. Este hallazgo desafía las teorías actuales de la formación de planetas, particularmente para los gigantes gaseosos que se forman lejos de su estrella.
Área de la Ciencia:
- Ciencia exoplanetaria Ciencia de los exoplanetas.
- La astrofísica es la astrofísica.
- Formación de planetas Formación de planetas
Sus antecedentes:
- Las imágenes de alto contraste en el infrarrojo cercano revelaron tres planetas gigantes que orbitan la estrella HR 8799.
- Estos planetas tienen órbitas amplias (>25 UA) y son jóvenes (<100 Myr), permaneciendo calientes y luminosos.
- Un debate clave en la ciencia de los exoplanetas se refiere a los mecanismos de formación de los planetas exteriores masivos (>10 UA).
Objetivo del estudio:
- Para investigar las teorías de formación de planetas para el sistema HR 8799.
- Para informar sobre el descubrimiento de un planeta adicional dentro del sistema HR 8799.
- Analizar las implicaciones del sistema multiplanetario en los modelos de formación actuales.
Principales métodos:
- Se utilizaron técnicas de imagen de alto contraste en el infrarrojo cercano.
- Analizó datos de observación para detectar y caracterizar exoplanetas.
- Comparó la arquitectura del sistema con los modelos de formación de planetas existentes.
Principales resultados:
- Un cuarto planeta gigante fue detectado dentro del sistema HR 8799.
- Este nuevo planeta se encuentra en el interior de los planetas previamente conocidos y tiene una masa similar.
- El sistema ahora comprende cuatro planetas gigantes jóvenes con amplias separaciones.
Conclusiones:
- El sistema HR 8799 con cuatro planetas gigantes desafía los modelos actuales de formación de planetas.
- La formación in situ de los cuatro planetas no se explica adecuadamente por las teorías existentes.
- El sistema sirve como un laboratorio crucial para estudiar la evolución de los planetas gigantes a grandes distancias orbitales.
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