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La curva de fase óptica de Kepler del exoplaneta HAT-P-7b
W J Borucki1, D Koch, J Jenkins
1NASA Ames Research Center, Moffett Field, CA 94035, USA. william.j.borucki@nasa.gov
Science (New York, N.Y.)
|August 8, 2009
Resumen
Los datos de la misión Kepler revelaron la emisión térmica diurna y la luz reflejada del exoplaneta HAT-P-7b. La profundidad de ocultación demostró una precisión fotométrica adecuada para detectar exoplanetas del tamaño de la Tierra.
Área de la Ciencia:
- Ciencia exoplanetaria Ciencia de los exoplanetas.
- La astrofísica estelar es la astrofísica estelar.
- La fotometría es la fotometría.
Sus antecedentes:
- La misión Kepler fue diseñada para detectar exoplanetas del tamaño de la Tierra utilizando fotometría de tránsito.
- HAT-P-7b es un conocido exoplaneta en tránsito gigante.
Objetivo del estudio:
- Para analizar los datos fotométricos de HAT-P-7b durante la fase de puesta en marcha de la misión Kepler.
- Para interpretar las variaciones de luz observadas como variaciones de fase y ocultaciones.
Principales métodos:
- Adquisición y análisis de diez días de datos fotométricos del telescopio espacial Kepler.
- Medición de los cambios de flujo durante la órbita planetaria y la ocultación.
Principales resultados:
- Se observaron variaciones suaves de la luz debido a la órbita y fase de HAT-P-7b.
- Se detectó una caída significativa de flujo de 130 +/- 11 ppm durante la ocultación del planeta.
- La profundidad de ocultación indica una alta precisión fotométrica.
Conclusiones:
- Los datos observados representan la emisión térmica diurna y la luz reflejada de HAT-P-7b.
- La precisión fotométrica de Kepler es comparable a la detección de planetas en tránsito del tamaño de la Tierra.
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