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RETRACTADO: Descubrimiento de imágenes directas de un exoplaneta joviano dentro de un sistema de estrellas triple

Kevin Wagner¹, Dániel Apai², Markus Kasper³

¹Department of Astronomy and Steward Observatory, The University of Arizona, 933 North Cherry Avenue, Tucson, AZ 85721, USA. kwagner@as.arizona.edu.

Science (New York, N.Y.)

|July 9, 2016

Resumen

Los astrónomos descubrieron un joven exoplaneta joviano de baja masa usando imágenes directas en un sistema triple de estrellas único. Este hallazgo amplía nuestra comprensión de la formación de planetas en entornos estelares complejos.

Área de la Ciencia:

Astronomía y astrofísica
Ciencias exoplanetarias

Sus antecedentes:

La imagen directa es una técnica clave para detectar y caracterizar los exoplanetas a través de su emisión térmica.
La comprensión de la formación de planetas y la dinámica en los sistemas estelares múltiples es crucial para una imagen completa de las arquitecturas de los sistemas planetarios.

Objetivo del estudio:

Para reportar el descubrimiento y la caracterización atmosférica de un joven planeta Joviano en un sistema de tres estrellas.
Para investigar la dinámica orbital única de este exoplaneta dentro de su sistema jerárquico de estrellas triples.

Principales métodos:

Imágenes directas del exoplaneta a través de su emisión térmica.
Espectroscopia del infrarrojo cercano para la caracterización de las propiedades atmosféricas.

Principales resultados:

Descubrimiento de HD 131399Ab, un joven planeta joviano en un sistema de estrellas triples.
HD 131399Ab tiene un semieje mayor más cercano a sus estrellas anfitrionas que cualquier exoplaneta conocido anteriormente en un sistema similar, lo que lo hace dinámicamente único.
El planeta es uno de los exoplanetas de masa más baja (4 ± 1 masas de Júpiter) y más fríos (850 ± 50 Kelvin) directamente fotografiados.

Conclusiones:

Los planetas masivos pueden existir en órbitas amplias y potencialmente inestables dentro de sistemas multiestelares.
El descubrimiento de HD 131399Ab desafía los modelos existentes de formación de planetas y estabilidad en configuraciones estelares complejas.

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