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Asymmetries observed in Saturn's magnetopause geometry

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Asymmetries observed in Saturn's magnetopause geometry. / Pilkington, N. M.; Achilleos, N.; Arridge, C. S.; Guio, P.; Masters, A.; Ray, Licia; Sergis, N.; Thomsen, M. F.; Coates, A. J.; Dougherty, M. K.

In: Geophysical Research Letters, Vol. 42, No. 17, 16.09.2015, p. 6890-6898.

Research output: Contribution to journalJournal article

Harvard

Pilkington, NM, Achilleos, N, Arridge, CS, Guio, P, Masters, A, Ray, L, Sergis, N, Thomsen, MF, Coates, AJ & Dougherty, MK 2015, 'Asymmetries observed in Saturn's magnetopause geometry', Geophysical Research Letters, vol. 42, no. 17, pp. 6890-6898. https://doi.org/10.1002/2015GL065477

APA

Pilkington, N. M., Achilleos, N., Arridge, C. S., Guio, P., Masters, A., Ray, L., Sergis, N., Thomsen, M. F., Coates, A. J., & Dougherty, M. K. (2015). Asymmetries observed in Saturn's magnetopause geometry. Geophysical Research Letters, 42(17), 6890-6898. https://doi.org/10.1002/2015GL065477

Vancouver

Pilkington NM, Achilleos N, Arridge CS, Guio P, Masters A, Ray L et al. Asymmetries observed in Saturn's magnetopause geometry. Geophysical Research Letters. 2015 Sep 16;42(17):6890-6898. https://doi.org/10.1002/2015GL065477

Author

Pilkington, N. M. ; Achilleos, N. ; Arridge, C. S. ; Guio, P. ; Masters, A. ; Ray, Licia ; Sergis, N. ; Thomsen, M. F. ; Coates, A. J. ; Dougherty, M. K. / Asymmetries observed in Saturn's magnetopause geometry. In: Geophysical Research Letters. 2015 ; Vol. 42, No. 17. pp. 6890-6898.

Bibtex

@article{4e2d8481744b410eb1d33e43afe60c04,
title = "Asymmetries observed in Saturn's magnetopause geometry",
abstract = "For over 10 years, the Cassini spacecraft has patrolled Saturn's magnetosphere and observed its magnetopause boundary over a wide range of prevailing solar wind and interior plasma conditions. We now have data that enable us to resolve a significant dawn-dusk asymmetry and find that the magnetosphere extends farther from the planet on the dawnside of the planet by 7 +/- 1%. In addition, an opposing dawn-dusk asymmetry in the suprathermal plasma pressure adjacent to the magnetopause has been observed. This probably acts to reduce the size asymmetry and may explain the discrepancy between the degree of asymmetry found here and a similar asymmetry found by Kivelson and Jia (2014) using MHD simulations. Finally, these observations sample a wide range of season, allowing the {"}intrinsic{"} polar flattening (14 +/- 1%) caused by the magnetodisc to be separated from the seasonally induced north-south asymmetry in the magnetopause shape found theoretically (5 +/- 1% when the planet's magnetic dipole is tilted away from the Sun by 10-17 degrees).",
keywords = "SOLAR-WIND, BOW SHOCK, MAGNETOSPHERE, ENCELADUS, PLASMA, SHAPE, MIMI",
author = "Pilkington, {N. M.} and N. Achilleos and Arridge, {C. S.} and P. Guio and A. Masters and Licia Ray and N. Sergis and Thomsen, {M. F.} and Coates, {A. J.} and Dougherty, {M. K.}",
year = "2015",
month = sep,
day = "16",
doi = "10.1002/2015GL065477",
language = "English",
volume = "42",
pages = "6890--6898",
journal = "Geophysical Research Letters",
issn = "0094-8276",
publisher = "John Wiley & Sons, Ltd",
number = "17",

}

RIS

TY - JOUR

T1 - Asymmetries observed in Saturn's magnetopause geometry

AU - Pilkington, N. M.

AU - Achilleos, N.

AU - Arridge, C. S.

AU - Guio, P.

AU - Masters, A.

AU - Ray, Licia

AU - Sergis, N.

AU - Thomsen, M. F.

AU - Coates, A. J.

AU - Dougherty, M. K.

PY - 2015/9/16

Y1 - 2015/9/16

N2 - For over 10 years, the Cassini spacecraft has patrolled Saturn's magnetosphere and observed its magnetopause boundary over a wide range of prevailing solar wind and interior plasma conditions. We now have data that enable us to resolve a significant dawn-dusk asymmetry and find that the magnetosphere extends farther from the planet on the dawnside of the planet by 7 +/- 1%. In addition, an opposing dawn-dusk asymmetry in the suprathermal plasma pressure adjacent to the magnetopause has been observed. This probably acts to reduce the size asymmetry and may explain the discrepancy between the degree of asymmetry found here and a similar asymmetry found by Kivelson and Jia (2014) using MHD simulations. Finally, these observations sample a wide range of season, allowing the "intrinsic" polar flattening (14 +/- 1%) caused by the magnetodisc to be separated from the seasonally induced north-south asymmetry in the magnetopause shape found theoretically (5 +/- 1% when the planet's magnetic dipole is tilted away from the Sun by 10-17 degrees).

AB - For over 10 years, the Cassini spacecraft has patrolled Saturn's magnetosphere and observed its magnetopause boundary over a wide range of prevailing solar wind and interior plasma conditions. We now have data that enable us to resolve a significant dawn-dusk asymmetry and find that the magnetosphere extends farther from the planet on the dawnside of the planet by 7 +/- 1%. In addition, an opposing dawn-dusk asymmetry in the suprathermal plasma pressure adjacent to the magnetopause has been observed. This probably acts to reduce the size asymmetry and may explain the discrepancy between the degree of asymmetry found here and a similar asymmetry found by Kivelson and Jia (2014) using MHD simulations. Finally, these observations sample a wide range of season, allowing the "intrinsic" polar flattening (14 +/- 1%) caused by the magnetodisc to be separated from the seasonally induced north-south asymmetry in the magnetopause shape found theoretically (5 +/- 1% when the planet's magnetic dipole is tilted away from the Sun by 10-17 degrees).

KW - SOLAR-WIND

KW - BOW SHOCK

KW - MAGNETOSPHERE

KW - ENCELADUS

KW - PLASMA

KW - SHAPE

KW - MIMI

U2 - 10.1002/2015GL065477

DO - 10.1002/2015GL065477

M3 - Journal article

VL - 42

SP - 6890

EP - 6898

JO - Geophysical Research Letters

JF - Geophysical Research Letters

SN - 0094-8276

IS - 17

ER -