Balikhin, M;
Walker, S;
Treumann, R;
Alleyne, H;
Krasnoselskikh, V;
Gedalin, M;
Andre, M;
... Fazakerley, A; + view all
(2005)
Ion sound wave packets at the quasiperpendicular shock front.
Geophysical Research Letters
, 32
(24)
, Article L24106. 10.1029/2005GL024660.
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Abstract
Electric field measurements from a single spacecraft have been used to study ion-sound turbulence observed within the Earth's bow shock. The observed frequency of the ion-sound waves can be both lower and higher than the local electron cyclotron frequency depending upon the direction of wave propagation in the plasma rest frame. The ion-sound waves observed upstream of the ramp can not be generated either by an instability related to the gradient in the electron temperature or an electric current within the ramp. A comparison of wave vectors for distinctive wave packets indicate that non-stationary, short scale current layers formed in the processes of the ramp evolution might be the source of the free energy for such waves.
| Type: | Article |
|---|---|
| Title: | Ion sound wave packets at the quasiperpendicular shock front |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1029/2005GL024660 |
| Publisher version: | http://dx.doi.org/10.1029/2005GL024660 |
| Language: | English |
| Additional information: | Copyright 2005 by the American Geophysical Union |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Space and Climate Physics |
| URI: | https://discovery.ucl.ac.uk/id/eprint/162799 |
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