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Identifying the Driver of Pulsating Aurora
- Nishimura, Y. (author)
- Bortnik, J. (author)
- Li, W. (author)
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- Thorne, R. M. (author)
- Lyons, L. R. (author)
- Angelopoulos, V. (author)
- Mende, S. B. (author)
- Bonnell, J. W. (author)
- Le Contel, O. (author)
- Ergun, R. (author)
- Auster, U. (author)
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- (creator_code:org_t)
- American Association for the Advancement of Science (AAAS), 2010
- 2010
- English.
- In: Science. - : American Association for the Advancement of Science (AAAS). - 0036-8075 .- 1095-9203. ; 330:6000, s. 81-84
- Journal article (peer-reviewed)
Abstract
Subject headings
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- Pulsating aurora, a spectacular emission that appears as blinking of the upper atmosphere in the polar regions, is known to be excited by modulated, downward-streaming electrons. Despite its distinctive feature, identifying the driver of the electron precipitation has been a long-standing problem. Using coordinated satellite and ground-based all-sky imager observations from the THEMIS mission, we provide direct evidence that a naturally occurring electromagnetic wave, lower-band chorus, can drive pulsating aurora. Because the waves at a given equatorial location in space correlate with a single pulsating auroral patch in the upper atmosphere, our findings can also be used to constrain magnetic field models with much higher accuracy than has previously been possible.
Subject headings
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
Keyword
- Physics
- Fysik
Publication and Content Type
- ref (subject category)
- art (subject category)
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- Nishimura, Y.
- Bortnik, J.
- Li, W.
- Thorne, R. M.
- Lyons, L. R.
- Angelopoulos, V.
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- Mende, S. B.
- Bonnell, J. W.
- Le Contel, O.
- Cully, Chris M.
- Ergun, R.
- Auster, U.
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- About the subject
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- NATURAL SCIENCES
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- Science
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- Uppsala University
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