Possible magnetospheric Kelvin-Helmholtz vortex signatures near the post-noon magnetopause

F. Palermo; F. Califano; O. Le Contel; F. Pegoraro

Possible magnetospheric Kelvin-Helmholtz vortex signatures near the post-noon magnetopause

F. Palermo
, F. Califano
, O. Le Contel
, F. Pegoraro

University of Pisa
LPP

Research output: Contribution to journal › Conference article › peer-review

Abstract

We report on magnetospheric Kelvin-Helmholtz (KH) vortex signatures detected by THEMIS probes located near the post-noon magnetopause in the magnetosphere side for northward magnetosheath magnetic field. Oscillations of the magnetic field and of the ion velocity are measured with a period around 300 seconds. Once we moved into a magnetopause boundary coordinate system, the magnetic field and ion velocity oscillations display vortex-like signatures. Yet ion spectrograms show no strong magnetosheath/magnetosphere plasma mixing and these vortices appear mostly as magnetospheric vortices. Numerical simulations of the KH instability are presented to support this possibility.

Original language	English
Pages (from-to)	189-192
Number of pages	4
Journal	Memorie della Societa Astronomica Italiana - Journal of the Italian Astronomical Society
Volume	14
Publication status	Published - 1 Jan 2009
Externally published	Yes
Event	53rd Meeting of the Italian Astronomical Society - Pisa, Italy Duration: 4 May 2009 → 8 May 2009

Keywords

Kelvin-Helmholtz instability
Magnetosphere
Solar wind
THEMIS

Cite this

@article{c4460324ec464b39b931e0e8766b1ba3,

title = "Possible magnetospheric Kelvin-Helmholtz vortex signatures near the post-noon magnetopause",

abstract = "We report on magnetospheric Kelvin-Helmholtz (KH) vortex signatures detected by THEMIS probes located near the post-noon magnetopause in the magnetosphere side for northward magnetosheath magnetic field. Oscillations of the magnetic field and of the ion velocity are measured with a period around 300 seconds. Once we moved into a magnetopause boundary coordinate system, the magnetic field and ion velocity oscillations display vortex-like signatures. Yet ion spectrograms show no strong magnetosheath/magnetosphere plasma mixing and these vortices appear mostly as magnetospheric vortices. Numerical simulations of the KH instability are presented to support this possibility.",

keywords = "Kelvin-Helmholtz instability, Magnetosphere, Solar wind, THEMIS",

author = "F. Palermo and F. Califano and \{Le Contel\}, O. and F. Pegoraro",

note = "Publisher Copyright: {\textcopyright} SAIt 2010.; 53rd Meeting of the Italian Astronomical Society ; Conference date: 04-05-2009 Through 08-05-2009",

year = "2009",

month = jan,

day = "1",

language = "English",

volume = "14",

pages = "189--192",

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TY - JOUR

T1 - Possible magnetospheric Kelvin-Helmholtz vortex signatures near the post-noon magnetopause

AU - Palermo, F.

AU - Califano, F.

AU - Le Contel, O.

AU - Pegoraro, F.

N1 - Publisher Copyright: © SAIt 2010.

PY - 2009/1/1

Y1 - 2009/1/1

N2 - We report on magnetospheric Kelvin-Helmholtz (KH) vortex signatures detected by THEMIS probes located near the post-noon magnetopause in the magnetosphere side for northward magnetosheath magnetic field. Oscillations of the magnetic field and of the ion velocity are measured with a period around 300 seconds. Once we moved into a magnetopause boundary coordinate system, the magnetic field and ion velocity oscillations display vortex-like signatures. Yet ion spectrograms show no strong magnetosheath/magnetosphere plasma mixing and these vortices appear mostly as magnetospheric vortices. Numerical simulations of the KH instability are presented to support this possibility.

AB - We report on magnetospheric Kelvin-Helmholtz (KH) vortex signatures detected by THEMIS probes located near the post-noon magnetopause in the magnetosphere side for northward magnetosheath magnetic field. Oscillations of the magnetic field and of the ion velocity are measured with a period around 300 seconds. Once we moved into a magnetopause boundary coordinate system, the magnetic field and ion velocity oscillations display vortex-like signatures. Yet ion spectrograms show no strong magnetosheath/magnetosphere plasma mixing and these vortices appear mostly as magnetospheric vortices. Numerical simulations of the KH instability are presented to support this possibility.

KW - Kelvin-Helmholtz instability

KW - Magnetosphere

KW - Solar wind

KW - THEMIS

UR - https://www.scopus.com/pages/publications/84883316937

M3 - Conference article

AN - SCOPUS:84883316937

SN - 1824-016X

VL - 14

SP - 189

EP - 192

JO - Memorie della Societa Astronomica Italiana - Journal of the Italian Astronomical Society

JF - Memorie della Societa Astronomica Italiana - Journal of the Italian Astronomical Society

T2 - 53rd Meeting of the Italian Astronomical Society

Y2 - 4 May 2009 through 8 May 2009

ER -

Possible magnetospheric Kelvin-Helmholtz vortex signatures near the post-noon magnetopause

Abstract

Keywords

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