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Whistler mode waves...
Whistler mode waves atmagnetotail dipolarization fronts
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- Viberg, Henrik (författare)
- Uppsala universitet,Institutionen för fysik och astronomi
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Khotyaintsev, Yu. V. (författare)
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Vaivads, A. (författare)
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Andre, M. (författare)
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Fu, H. S. (författare)
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Cornilleau-Wehrlin, N. (författare)
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(creator_code:org_t)
- 2014
- 2014
- Engelska.
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Ingår i: J GEOPHYS RES-SPACE. - 2169-9380. ; 119:4, s. 2605-2611
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- We report the statistics of whistler mode waves observed in relation to dipolarization fronts (DFs) in Earth's magnetotail using data from the four Cluster spacecraft spanning a period of 9 years, 2001-2009. We show that whistler mode waves are common in a vicinity of DFs: between 30 and 60% of all DFs are associated with whistlers. Whistlers are about 7 times more likely to be observed near a DF than at any random location in the magnetotail. Therefore, whistlers are a characteristic signature of DFs. We find that whistlers are most often detected in the flux pileup region (FPR) following the DF, close to the center of the current sheet (B-x approximate to 0) and in association with anisotropic electron distributions (T>T-vertical bar). This suggests that we typically observe emissions in the source region where they are generated by the anisotropic electrons produced by the betatron process inside the FPR.
Ämnesord
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Nyckelord
- whistler waves
- dipolarization fronts
- statistics
- magnetic reconnection
- wave-particle interactions
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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