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Ondas de densidad en espiral en un disco protoplanetario joven

Laura M Pérez¹, John M Carpenter², Sean M Andrews³

¹Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, 53121 Bonn, Germany. lperez@mpifr-bonn.mpg.de.

Science (New York, N.Y.)

|October 7, 2016

Resumen

Los astrónomos detectaron brazos espirales que alcanzaban el plano medio del disco protoplanetario de una estrella joven usando el Atacama Large Millimeter/submillimeter Array. Estas estructuras pueden indicar actividad de formación de planetas en la región más densa del disco.

Área de la Ciencia:

La astronomía
La astrofísica
Ciencias planetarias

Sus antecedentes:

Se teoriza que las ondas de densidad en espiral se forman en discos protoplanetarios debido a las fuerzas gravitacionales.
Las observaciones anteriores de estructuras espirales en discos protoplanetarios no pudieron sondear el plano medio, donde reside la mayor parte de la masa del disco y se produce la formación de planetas.

Objetivo del estudio:

Para investigar las ondas de densidad en espiral en el plano medio de un disco protoplanetario.
Para determinar si se pueden observar estructuras espirales que llegan al plano medio del disco.

Principales métodos:

Utilizó el Atacama Large Millimeter/submillimeter Array (ALMA) para observaciones de alta resolución.
Analizó las emisiones de ondas milimétricas del disco protoplanetario de la joven estrella Elias 2-27.

Principales resultados:

Detectamos un par de brazos espirales simétricos en el disco protoplanetario Elias 2-27.
Confirmado que estos brazos espirales se extienden a las regiones externas del disco y son rastreables hasta el plano medio.
Se observó una brecha de emisión en el interior de los brazos espirales, más cerca de la estrella central.

Conclusiones:

Los brazos espirales detectados probablemente representan choques de ondas de densidad que se propagan en el plano medio del disco.
Estos hallazgos proporcionan evidencia observacional de fenómenos que ocurren en la región de formación de planetas de un disco protoplanetario.

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