Unusual nonlinear waves in the Venusian magnetosheath

Within the Venusian magnetosheath, Venus Express has observed the existence of high‐amplitude, nonlinear waves which have been interpreted as large‐scale nonlinear rotational structures within the magnetic field. A number of mechanisms have been proposed that can be used to explain their origin. Ven...

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Veröffentlicht in:Journal of Geophysical Research: Space Physics 2011-01, Vol.116 (A1), p.n/a
Hauptverfasser: Walker, S. N., Balikhin, M. A., Zhang, T. L., Gedalin, M. E., Pope, S. A., Dimmock, A. P., Fedorov, A. O.
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container_issue A1
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container_title Journal of Geophysical Research: Space Physics
container_volume 116
creator Walker, S. N.
Balikhin, M. A.
Zhang, T. L.
Gedalin, M. E.
Pope, S. A.
Dimmock, A. P.
Fedorov, A. O.
description Within the Venusian magnetosheath, Venus Express has observed the existence of high‐amplitude, nonlinear waves which have been interpreted as large‐scale nonlinear rotational structures within the magnetic field. A number of mechanisms have been proposed that can be used to explain their origin. Venus Express data have been searched for other examples of the similar structures. It appears that such structures are quite rare, being observed during only 8 of the dayside magnetosheath crossings among 676 that took place between April 2006 and February 2008. All together, only 50 such waves have been identified during these 8 crossings. The properties of these structures were studied. After considering a number of possible generation mechanisms, it is concluded that the most probable generation mechanism is the Kelvin‐Helmholtz Instability; however, other mechanisms such as shock‐related processes cannot be completely discounted.
doi_str_mv 10.1029/2010JA015916
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source Wiley Online Library - AutoHoldings Journals; Wiley-Blackwell AGU Digital Library; Wiley Online Library Free Content; Alma/SFX Local Collection
subjects Astronomy
Astrophysics
Comets
Earth sciences
Earth, ocean, space
Exact sciences and technology
Magnetic fields
Magnetism
magnetosheath
Physics
Planetology
Planets
Sun
Venus
title Unusual nonlinear waves in the Venusian magnetosheath
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