Imperial College London
Alternate

Emeritus ProfessorStevenSchwartz

Faculty of Natural Sciences, Department of Physics

Distinguished Research Fellow
 
 
 
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Contact

 

s.schwartz Website

 
 
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Assistant

 

Mr Luke Kratzmann +44 (0)20 7594 7770

 
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Location

 

708BHuxley BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Gingell:2017:10.1002/2017JA024538,
author = {Gingell, IL and Schwartz, SJ and Burgess, D and Johlander, A and Russell, CT and Burch, JL and Ergun, RE and Fuselier, S and Gershman, DJ and Giles, BL and Goodrich, KA and Khotyaintsev, YV and Lavraud, B and Lindqvist, P-A and Strangeway, RJ and Trattner, K and Torbert, RB and Wei, H and Wilder, F},
doi = {10.1002/2017JA024538},
journal = {Journal of Geophysical Research: Space Physics},
pages = {11003--11017},
title = {MMS observations and hybrid simulations of surface ripples at a marginally quasi-parallel shock},
url = {http://dx.doi.org/10.1002/2017JA024538},
volume = {122},
year = {2017}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Simulations and observations of collisionless shocks have shown that deviations of the nominal local shock normal orientation, i.e. surface waves or ripples, are expected to propagate in the ramp and overshoot of quasi-perpendicular shocks. Here, we identify signatures of a surface ripple propagating during a crossing of Earth's marginally quasi-parallel (θBn∼45) or quasi-parallel bow shock shock on 2015-11-27 06:01:44 UTC by the Magnetospheric Multiscale (MMS) mission, and determine the ripple's properties using multi-spacecraft methods. Using two-dimensional hybrid simulations, we confirm that surface ripples are a feature of marginally quasi-parallel and quasi-parallel shocks under the observed solar wind conditions. In addition, since these marginally quasi-parallel and quasi-parallel shocks are expected to undergo a cyclic reformation of the shock front, we discuss the impact of multiple sources of non-stationarity on shock structure. Importantly, ripples are shown to be transient phenomena, developing faster than an ion gyroperiod and only during the period of the reformation cycle when a newly developed shock ramp is unaffected by turbulence in the foot. We conclude that the change in properties of the ripple observed by MMS is consistent with the reformation of the shock front over a timescale of an ion gyro-period.
AU  - Gingell,IL
AU  - Schwartz,SJ
AU  - Burgess,D
AU  - Johlander,A
AU  - Russell,CT
AU  - Burch,JL
AU  - Ergun,RE
AU  - Fuselier,S
AU  - Gershman,DJ
AU  - Giles,BL
AU  - Goodrich,KA
AU  - Khotyaintsev,YV
AU  - Lavraud,B
AU  - Lindqvist,P-A
AU  - Strangeway,RJ
AU  - Trattner,K
AU  - Torbert,RB
AU  - Wei,H
AU  - Wilder,F
DO  - 10.1002/2017JA024538
EP  - 11017
PY  - 2017///
SN  - 2169-9380
SP  - 11003
TI  - MMS observations and hybrid simulations of surface ripples at a marginally quasi-parallel shock
T2  - Journal of Geophysical Research: Space Physics
UR  - http://dx.doi.org/10.1002/2017JA024538
UR  - http://hdl.handle.net/10044/1/51963
VL  - 122
ER  -
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