@article{Pfau-Kempf:2016:10.5194/angeo-34-943-2016,
author = {Pfau-Kempf, Y and Hietala, H and Milan, SE and Juusola, L and Hoilijoki, S and Ganse, U and von, Alfthan S and Palmroth, M},
doi = {10.5194/angeo-34-943-2016},
journal = {Annales Geophysicae},
pages = {943--959},
title = {Evidence for transient, local ion foreshocks caused by dayside magnetopause reconnection},
url = {http://dx.doi.org/10.5194/angeo-34-943-2016},
volume = {34},
year = {2016}
}

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TY  - JOUR
AB  - We present a scenario resulting in time-dependent behaviour of the bow shock and transient, local ion reflection under unchanging solar wind conditions. Dayside magnetopause reconnection produces flux transfer events driving fast-mode wave fronts in the magnetosheath. These fronts push out the bow shock surface due to their increased downstream pressure. The resulting bow shock deformations lead to a configuration favourable to localized ion reflection and thus the formation of transient, travelling foreshock-like field-aligned ion beams. This is identified in two-dimensional global magnetospheric hybrid-Vlasov simulations of the Earth's magnetosphere performed using the Vlasiator model (http://vlasiator.fmi.fi). We also present observational data showing the occurrence of dayside reconnection and flux transfer events at the same time as Geotail observations of transient foreshock-like field-aligned ion beams. The spacecraft is located well upstream of the foreshock edge and the bow shock, during a steady southward interplanetary magnetic field and in the absence of any solar wind or interplanetary magnetic field perturbations. This indicates the formation of such localized ion foreshocks.
AU  - Pfau-Kempf,Y
AU  - Hietala,H
AU  - Milan,SE
AU  - Juusola,L
AU  - Hoilijoki,S
AU  - Ganse,U
AU  - von,Alfthan S
AU  - Palmroth,M
DO  - 10.5194/angeo-34-943-2016
EP  - 959
PY  - 2016///
SN  - 0992-7689
SP  - 943
TI  - Evidence for transient, local ion foreshocks caused by dayside magnetopause reconnection
T2  - Annales Geophysicae
UR  - http://dx.doi.org/10.5194/angeo-34-943-2016
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000387862700001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - http://hdl.handle.net/10044/1/72406
VL  - 34
ER  - 

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