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Emission Spectra02:39

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Published on: February 12, 2013

An auroral flare at Jupiter.

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
Summary
This summary is machine-generated.

Scientists discovered a new, rapidly brightening aurora emission near Jupiter

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Area of Science:

  • Planetary Science
  • Space Physics
  • Astrophysics

Background:

  • Jupiter's aurora is the Solar System's most powerful, primarily driven by planetary rotation and secondarily by solar wind.
  • Unlike Earth's aurora, which is solar wind-driven, Jupiter's auroral emissions exhibit distinct features like main ovals and diffuse regions.

Purpose of the Study:

  • To report the discovery of a novel, rapidly evolving auroral emission poleward of Jupiter's northern main oval.
  • To characterize the intensity, timescale, and potential drivers of this newly observed Jovian auroral phenomenon.

Main Methods:

  • Observations of Jupiter's aurora using far-ultraviolet, near-infrared, and visible-wavelength instruments.
  • Analysis of a specific four-minute exposure capturing a transient auroral event.

Main Results:

  • Discovery of a localized, bright auroral emission poleward of the northern main oval.
  • Observed a rapid intensity increase (30-fold within 70 seconds) followed by a similar decrease.
  • This flaring emission is linked to Jupiter's outer magnetosphere and may be influenced by solar wind changes.

Conclusions:

  • This transient auroral flaring event is a previously unreported phenomenon for Jupiter.
  • The discovery suggests a potential direct link between solar wind dynamics and intense, localized auroral emissions on Jupiter.
  • Further research is needed to fully understand the mechanisms driving these rapid auroral events.