Imperial College London
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DrHeliHietala

Faculty of Natural Sciences, Department of Physics

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Contact

 

+44 (0)20 7594 7660h.hietala CV

 
 
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Location

 

6M58Blackett LaboratorySouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Collinson:2023:10.1029/2023gl104610,
author = {Collinson, GA and Hietala, H and Plaschke, F and Karlsson, T and Wilson, LB and Archer, M and Battarbee, M and BlancoCano, X and Bertucci, C and Long, D and Opher, M and Sergis, N and Gasque, C and Liu, T and Raptis, S and Burne, S and Frahm, R and Zhang, T and Futaana, Y},
doi = {10.1029/2023gl104610},
journal = {Geophysical Research Letters},
title = {Shocklets and short large amplitude magnetic structures (SLAMS) in the high mach foreshock of Venus},
url = {http://dx.doi.org/10.1029/2023gl104610},
volume = {50},
year = {2023}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Shocklets and short large-amplitude magnetic structures (SLAMS) are steepened magnetic fluctuations commonly found in Earth's upstream foreshock. Here we present Venus Express observations from the 26th of February 2009 establishing their existence in the steady-state foreshock of Venus, building on a past study which found SLAMS during a substantial disturbance of the induced magnetosphere. The Venusian structures were comparable to those reported near Earth. The 2 Shocklets had magnetic compression ratios of 1.23 and 1.34 with linear polarization in the spacecraft frame. The 3 SLAMS had ratios between 3.22 and 4.03, two of which with elliptical polarization in the spacecraft frame. Statistical analysis suggests SLAMS coincide with unusually high solar wind Alfvén mach-number at Venus (12.5, this event). Thus, while we establish Shocklets and SLAMS can form in the stable Venusian foreshock, they may be rarer than at Earth. We estimate a lower limit of their occurrence rate of 14%.
AU  - Collinson,GA
AU  - Hietala,H
AU  - Plaschke,F
AU  - Karlsson,T
AU  - Wilson,LB
AU  - Archer,M
AU  - Battarbee,M
AU  - BlancoCano,X
AU  - Bertucci,C
AU  - Long,D
AU  - Opher,M
AU  - Sergis,N
AU  - Gasque,C
AU  - Liu,T
AU  - Raptis,S
AU  - Burne,S
AU  - Frahm,R
AU  - Zhang,T
AU  - Futaana,Y
DO  - 10.1029/2023gl104610
PY  - 2023///
SN  - 0094-8276
TI  - Shocklets and short large amplitude magnetic structures (SLAMS) in the high mach foreshock of Venus
T2  - Geophysical Research Letters
UR  - http://dx.doi.org/10.1029/2023gl104610
UR  - http://hdl.handle.net/10044/1/107823
VL  - 50
ER  -
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