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Descubrimiento de un análogo de Júpiter/Saturno con microlentes gravitacionales
B S Gaudi1, D P Bennett, A Udalski
1Department of Astronomy, Ohio State University, 140 West 18th Avenue, Columbus, OH 43210, USA. gaudi@astronomy.ohio-state.edu
Science (New York, N.Y.)
|February 16, 2008
Resumen
Los astrónomos descubrieron un sistema solar analógico a escala utilizando microlentes gravitacionales. Este hallazgo sugiere que sistemas similares al nuestro pueden ser comunes en toda la galaxia.
Área de la Ciencia:
- La astronomía y la astrofísica.
- Ciencia exoplanetaria Ciencia de los exoplanetas.
Sus antecedentes:
- Las búsquedas de planetas extrasolares revelan diversos sistemas, pero se desconoce la prevalencia de análogos del sistema solar.
- La microlente gravitacional es una técnica sensible a los sistemas de múltiples planetas, incluidos los análogos potenciales del sistema solar.
Objetivo del estudio:
- Para detectar y caracterizar un sistema de múltiples planetas mediante el uso de microlentes gravitacionales.
- Para evaluar el potencial común de los análogos del sistema solar.
Principales métodos:
- Utilizó microlentes gravitacionales para detectar exoplanetas.
- Identificaron dos planetas orbitando una estrella primaria.
Principales resultados:
- Se detectó un sistema de múltiples planetas con planetas de aproximadamente 0,71 y 0,27 masas de Júpiter a 2,3 y 4,6 UA.
- La estrella anfitriona tiene una masa de aproximadamente 0,50 masas solares, ubicada a 1,5 kiloparsecs de distancia.
- La relación de masa, la relación de separación y las temperaturas de equilibrio del sistema se asemejan a las de Júpiter y Saturno, lo que indica un sistema solar analógico a escala.
Conclusiones:
- El sistema descubierto es una versión a escala de nuestro sistema solar.
- Este descubrimiento, hecho con detecciones limitadas de microlentes, sugiere que los análogos del sistema solar podrían ser comunes.
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