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Tracing solar wind plasma entry into the magnetosphere using ion-to-electron temperature ratio

Research output: Contribution to Journal/Magazine › Journal article › peer-review

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Tracing solar wind plasma entry into the magnetosphere using ion-to-electron temperature ratio. / Lavraud, B.; Borovsky, J.E.; Genot, V. et al.
In: Geophysical Research Letters, Vol. 36, 25.09.2009, p. L18109.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Harvard

Lavraud, B, Borovsky, JE, Genot, V, Schwartz, SJ, Birn, J, Fazakerley, AN, Dunlop, MW, Taylor, MGGT, Hasegawa, H, Rouillard, AP, Berchem, J, Bogdanova, YV, Constantinescu, D, Dandouras, I, Eastwood, JP, Escoubet, CP, Frey, H, Jacquey, C, Panov, E, Pu, ZY, Shen, C, Shi, J, Sibeck, DG, Volwerk, M & Wild, JA 2009, 'Tracing solar wind plasma entry into the magnetosphere using ion-to-electron temperature ratio', Geophysical Research Letters, vol. 36, pp. L18109. https://doi.org/10.1029/2009GL039442

APA

Lavraud, B., Borovsky, J. E., Genot, V., Schwartz, S. J., Birn, J., Fazakerley, A. N., Dunlop, M. W., Taylor, M. G. G. T., Hasegawa, H., Rouillard, A. P., Berchem, J., Bogdanova, Y. V., Constantinescu, D., Dandouras, I., Eastwood, J. P., Escoubet, C. P., Frey, H., Jacquey, C., Panov, E., ... Wild, J. A. (2009). Tracing solar wind plasma entry into the magnetosphere using ion-to-electron temperature ratio. Geophysical Research Letters, 36, L18109. https://doi.org/10.1029/2009GL039442

Vancouver

Lavraud B, Borovsky JE, Genot V, Schwartz SJ, Birn J, Fazakerley AN et al. Tracing solar wind plasma entry into the magnetosphere using ion-to-electron temperature ratio. Geophysical Research Letters. 2009 Sept 25;36:L18109. doi: 10.1029/2009GL039442

Author

Lavraud, B. ; Borovsky, J.E. ; Genot, V. et al. / Tracing solar wind plasma entry into the magnetosphere using ion-to-electron temperature ratio. In: Geophysical Research Letters. 2009 ; Vol. 36. pp. L18109.

Bibtex

@article{a139939d891f43209864e583f55450a5,
title = "Tracing solar wind plasma entry into the magnetosphere using ion-to-electron temperature ratio",
abstract = "When the solar wind Mach number is low, typically such as in magnetic clouds, the physics of the bow shock leads to a downstream ion-to-electron temperature ratio that can be notably lower than usual. We utilize this property to trace solar wind plasma entry into the magnetosphere by use of Cluster measurements in the vicinity of the dusk magnetopause during the passage of a magnetic cloud at Earth on November 25, 2001. The ion-to-electron temperature ratio was indeed low in the magnetosheath (Ti/Te ∼ 3). In total, three magnetopause boundary layer intervals are encountered on that day. They all show that the low ion-to-electron temperature ratio can be preserved as the plasma enters the magnetosphere, and both with and without the observation of Kelvin-Helmholtz activity. This suggests that the ion-to-electron temperature ratio in the magnetopause boundary layer, which is usually high, is not prescribed by the heating characteristics of the plasma entry mechanism that formed these boundary layers. In the future, this property may be used to (1) further trace plasma entry into inner regions and (2) determine the preferred entry mechanisms if other theoretical, observational and simulation works can give indications on which mechanisms may alter this ratio.",
keywords = "Cluster, magnetosheath DCS-publications-id, art-962, DCS-publications-credits, iono, DCS-publications-personnel-id, 104",
author = "B. Lavraud and J.E. Borovsky and V. Genot and S.J. Schwartz and J. Birn and A.N. Fazakerley and M.W. Dunlop and M.G.G.T. Taylor and H. Hasegawa and A.P. Rouillard and J. Berchem and Y.V. Bogdanova and D. Constantinescu and I. Dandouras and J.P. Eastwood and C.P. Escoubet and H. Frey and C. Jacquey and E. Panov and Z.Y. Pu and C. Shen and J. Shi and D.G. Sibeck and M. Volwerk and Wild, {James A.}",
note = "{\textcopyright}2009. American Geophysical Union. All Rights Reserved.",
year = "2009",
month = sep,
day = "25",
doi = "10.1029/2009GL039442",
language = "English",
volume = "36",
pages = "L18109",
journal = "Geophysical Research Letters",
issn = "0094-8276",
publisher = "John Wiley & Sons, Ltd",

}

RIS

TY - JOUR

T1 - Tracing solar wind plasma entry into the magnetosphere using ion-to-electron temperature ratio

AU - Lavraud, B.

AU - Borovsky, J.E.

AU - Genot, V.

AU - Schwartz, S.J.

AU - Birn, J.

AU - Fazakerley, A.N.

AU - Dunlop, M.W.

AU - Taylor, M.G.G.T.

AU - Hasegawa, H.

AU - Rouillard, A.P.

AU - Berchem, J.

AU - Bogdanova, Y.V.

AU - Constantinescu, D.

AU - Dandouras, I.

AU - Eastwood, J.P.

AU - Escoubet, C.P.

AU - Frey, H.

AU - Jacquey, C.

AU - Panov, E.

AU - Pu, Z.Y.

AU - Shen, C.

AU - Shi, J.

AU - Sibeck, D.G.

AU - Volwerk, M.

AU - Wild, James A.

N1 - ©2009. American Geophysical Union. All Rights Reserved.

PY - 2009/9/25

Y1 - 2009/9/25

N2 - When the solar wind Mach number is low, typically such as in magnetic clouds, the physics of the bow shock leads to a downstream ion-to-electron temperature ratio that can be notably lower than usual. We utilize this property to trace solar wind plasma entry into the magnetosphere by use of Cluster measurements in the vicinity of the dusk magnetopause during the passage of a magnetic cloud at Earth on November 25, 2001. The ion-to-electron temperature ratio was indeed low in the magnetosheath (Ti/Te ∼ 3). In total, three magnetopause boundary layer intervals are encountered on that day. They all show that the low ion-to-electron temperature ratio can be preserved as the plasma enters the magnetosphere, and both with and without the observation of Kelvin-Helmholtz activity. This suggests that the ion-to-electron temperature ratio in the magnetopause boundary layer, which is usually high, is not prescribed by the heating characteristics of the plasma entry mechanism that formed these boundary layers. In the future, this property may be used to (1) further trace plasma entry into inner regions and (2) determine the preferred entry mechanisms if other theoretical, observational and simulation works can give indications on which mechanisms may alter this ratio.

AB - When the solar wind Mach number is low, typically such as in magnetic clouds, the physics of the bow shock leads to a downstream ion-to-electron temperature ratio that can be notably lower than usual. We utilize this property to trace solar wind plasma entry into the magnetosphere by use of Cluster measurements in the vicinity of the dusk magnetopause during the passage of a magnetic cloud at Earth on November 25, 2001. The ion-to-electron temperature ratio was indeed low in the magnetosheath (Ti/Te ∼ 3). In total, three magnetopause boundary layer intervals are encountered on that day. They all show that the low ion-to-electron temperature ratio can be preserved as the plasma enters the magnetosphere, and both with and without the observation of Kelvin-Helmholtz activity. This suggests that the ion-to-electron temperature ratio in the magnetopause boundary layer, which is usually high, is not prescribed by the heating characteristics of the plasma entry mechanism that formed these boundary layers. In the future, this property may be used to (1) further trace plasma entry into inner regions and (2) determine the preferred entry mechanisms if other theoretical, observational and simulation works can give indications on which mechanisms may alter this ratio.

KW - Cluster

KW - magnetosheath DCS-publications-id

KW - art-962

KW - DCS-publications-credits

KW - iono

KW - DCS-publications-personnel-id

KW - 104

U2 - 10.1029/2009GL039442

DO - 10.1029/2009GL039442

M3 - Journal article

VL - 36

SP - L18109

JO - Geophysical Research Letters

JF - Geophysical Research Letters

SN - 0094-8276

ER -