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Bringing the Visible Universe into Focus with Robo-AO
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Published on: February 12, 2013

Una llamarada auroral en Júpiter.

J H Waite1, G R Gladstone, W S Lewis

  • 1Department of Atmospheric, Oceanic, and Space Sciences, University of Michigan, Ann Arbor, Michigan 48109, USA. hunterw@umich.edu

Nature
|April 12, 2001
PubMed
Resumen

Los científicos descubrieron una nueva emisión de auroras que se ilumina rápidamente cerca de Júpiter.

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Área de la Ciencia:

  • Ciencias planetarias Ciencias planetarias.
  • Física del espacio Física del espacio
  • La astrofísica es la astrofísica.

Sus antecedentes:

  • La aurora de Júpiter es la más poderosa del Sistema Solar, impulsada principalmente por la rotación planetaria y secundariamente por el viento solar.
  • A diferencia de la aurora de la Tierra, que es impulsada por el viento solar, las emisiones aurorales de Júpiter exhiben características distintas como óvalos principales y regiones difusas.

Objetivo del estudio:

  • Para informar sobre el descubrimiento de una nueva emisión de auroras que evoluciona rápidamente hacia el polo del óvalo principal del norte de Júpiter.
  • Para caracterizar la intensidad, la escala de tiempo, y los conductores potenciales de este recién observado fenómeno auroral joviano.

Principales métodos:

  • Observaciones de la aurora de Júpiter utilizando instrumentos de largo ultravioleta, infrarrojo cercano y longitud de onda visible.
  • Análisis de una exposición específica de cuatro minutos que captura un evento auroral transitorio.

Principales resultados:

  • Descubrimiento de una localizada y brillante emisión auroral polar hacia el norte del óvalo principal.
  • Se observó un rápido aumento de la intensidad (30 veces en 70 segundos) seguido de una disminución similar.
  • Esta emisión de llamaradas está vinculada a la magnetosfera externa de Júpiter y puede estar influenciada por los cambios en el viento solar.

Conclusiones:

  • Este evento de llamaradas aurorales transitorias es un fenómeno no reportado previamente para Júpiter.
  • El descubrimiento sugiere un posible vínculo directo entre la dinámica del viento solar y las intensas y localizadas emisiones de auroras en Júpiter.
  • Se necesita más investigación para comprender completamente los mecanismos que impulsan estos rápidos eventos aurorales.