@article{Matteini:2014:10.1002/2013GL058482,
author = {Matteini, L and Horbury, TS and Neugebauer, M and Goldstein, BE},
doi = {10.1002/2013GL058482},
journal = {Geophysical Research Letters},
pages = {259--265},
title = {Dependence of solar wind speed on the local magnetic field orientation: Role of Alfvenic fluctuations},
url = {http://dx.doi.org/10.1002/2013GL058482},
volume = {41},
year = {2014}
}

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TY  - JOUR
AB  - We report an analysis of correlations between magnetic field and velocity fluctuations in the fast solar wind beyond 1 AU at high latitudes. We have found that on scales shorter than the microstream structures, there exists a welldefined dependence of the flow speed on the angle between the magnetic field vector and the radial direction. Solar wind is found to be slightly faster when the measured magnetic field vector is transverse to the velocity, while it is always slower when the magnetic field is parallel, or antiparallel, to the radial direction. We show that this correlation is a direct consequence of the high Alfvénicity of fast wind fluctuations and that it can be reasonably described by a simple model taking into account the main properties of the lowfrequency antisunward Alfvén fluctuations as observed in the solar wind plasma. We also discuss how switchbacks, short periods of magnetic field reversals, naturally fit in this new observed correlation.
AU  - Matteini,L
AU  - Horbury,TS
AU  - Neugebauer,M
AU  - Goldstein,BE
DO  - 10.1002/2013GL058482
EP  - 265
PY  - 2014///
SN  - 0094-8276
SP  - 259
TI  - Dependence of solar wind speed on the local magnetic field orientation: Role of Alfvenic fluctuations
T2  - Geophysical Research Letters
UR  - http://dx.doi.org/10.1002/2013GL058482
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000332991000009&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - https://agupubs.onlinelibrary.wiley.com/doi/10.1002/2013GL058482
VL  - 41
ER  - 

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