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Dependence of the open-closed field line boundary in Saturn's ionosphere on both the IMF and solar wind dynamic pressure: comparison with the UV auroral oval observed by the HST

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Dependence of the open-closed field line boundary in Saturn's ionosphere on both the IMF and solar wind dynamic pressure: comparison with the UV auroral oval observed by the HST. / Belenkaya, E. S.; Cowley, S. W. H.; Badman, S. V. et al.
In: Annales Geophysicae, Vol. 26, No. 1, 04.02.2008, p. 159-166.

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

Harvard

Belenkaya, ES, Cowley, SWH, Badman, SV, Blokhina, MS & Kalegaev, VV 2008, 'Dependence of the open-closed field line boundary in Saturn's ionosphere on both the IMF and solar wind dynamic pressure: comparison with the UV auroral oval observed by the HST', Annales Geophysicae, vol. 26, no. 1, pp. 159-166. https://doi.org/10.5194/angeo-26-159-2008

APA

Belenkaya, E. S., Cowley, S. W. H., Badman, S. V., Blokhina, M. S., & Kalegaev, V. V. (2008). Dependence of the open-closed field line boundary in Saturn's ionosphere on both the IMF and solar wind dynamic pressure: comparison with the UV auroral oval observed by the HST. Annales Geophysicae, 26(1), 159-166. https://doi.org/10.5194/angeo-26-159-2008

Vancouver

Belenkaya ES, Cowley SWH, Badman SV, Blokhina MS, Kalegaev VV. Dependence of the open-closed field line boundary in Saturn's ionosphere on both the IMF and solar wind dynamic pressure: comparison with the UV auroral oval observed by the HST. Annales Geophysicae. 2008 Feb 4;26(1):159-166. doi: 10.5194/angeo-26-159-2008

Author

Belenkaya, E. S. ; Cowley, S. W. H. ; Badman, S. V. et al. / Dependence of the open-closed field line boundary in Saturn's ionosphere on both the IMF and solar wind dynamic pressure : comparison with the UV auroral oval observed by the HST. In: Annales Geophysicae. 2008 ; Vol. 26, No. 1. pp. 159-166.

Bibtex

@article{22026751f8a64aa99f773c908450c79e,
title = "Dependence of the open-closed field line boundary in Saturn's ionosphere on both the IMF and solar wind dynamic pressure: comparison with the UV auroral oval observed by the HST",
abstract = "We model the open magnetic field region in Saturn's southern polar ionosphere during two compression regions observed by the Cassini spacecraft upstream of Saturn in January 2004, and compare these with the auroral ovals observed simultaneously in ultraviolet images obtained by the Hubble Space Telescope. The modelling employs the paraboloid model of Saturn's magnetospheric magnetic field, whose parameters are varied according to the observed values of both the solar wind dynamic pressure and the interplanetary magnetic field (IMF) vector. It is shown that the open field area responds strongly to the IMF vector for both expanded and compressed magnetic models, corresponding to low and high dynamic pressure, respectively. It is also shown that the computed open field region agrees with the poleward boundary of the auroras as well as or better than those derived previously from a model in which only the variation of the IMF vector was taken into account. The results again support the hypothesis that the auroral oval at Saturn is associated with the open-closed field line boundary and hence with the solar wind interaction.",
keywords = "Magnetospheric physics",
author = "Belenkaya, {E. S.} and Cowley, {S. W. H.} and Badman, {S. V.} and Blokhina, {M. S.} and V.v. Kalegaev",
note = "{\textcopyright} European Geosciences Union 2008",
year = "2008",
month = feb,
day = "4",
doi = "10.5194/angeo-26-159-2008",
language = "English",
volume = "26",
pages = "159--166",
journal = "Annales Geophysicae",
issn = "0992-7689",
publisher = "European Geosciences Union",
number = "1",

}

RIS

TY - JOUR

T1 - Dependence of the open-closed field line boundary in Saturn's ionosphere on both the IMF and solar wind dynamic pressure

T2 - comparison with the UV auroral oval observed by the HST

AU - Belenkaya, E. S.

AU - Cowley, S. W. H.

AU - Badman, S. V.

AU - Blokhina, M. S.

AU - Kalegaev, V.v.

N1 - © European Geosciences Union 2008

PY - 2008/2/4

Y1 - 2008/2/4

N2 - We model the open magnetic field region in Saturn's southern polar ionosphere during two compression regions observed by the Cassini spacecraft upstream of Saturn in January 2004, and compare these with the auroral ovals observed simultaneously in ultraviolet images obtained by the Hubble Space Telescope. The modelling employs the paraboloid model of Saturn's magnetospheric magnetic field, whose parameters are varied according to the observed values of both the solar wind dynamic pressure and the interplanetary magnetic field (IMF) vector. It is shown that the open field area responds strongly to the IMF vector for both expanded and compressed magnetic models, corresponding to low and high dynamic pressure, respectively. It is also shown that the computed open field region agrees with the poleward boundary of the auroras as well as or better than those derived previously from a model in which only the variation of the IMF vector was taken into account. The results again support the hypothesis that the auroral oval at Saturn is associated with the open-closed field line boundary and hence with the solar wind interaction.

AB - We model the open magnetic field region in Saturn's southern polar ionosphere during two compression regions observed by the Cassini spacecraft upstream of Saturn in January 2004, and compare these with the auroral ovals observed simultaneously in ultraviolet images obtained by the Hubble Space Telescope. The modelling employs the paraboloid model of Saturn's magnetospheric magnetic field, whose parameters are varied according to the observed values of both the solar wind dynamic pressure and the interplanetary magnetic field (IMF) vector. It is shown that the open field area responds strongly to the IMF vector for both expanded and compressed magnetic models, corresponding to low and high dynamic pressure, respectively. It is also shown that the computed open field region agrees with the poleward boundary of the auroras as well as or better than those derived previously from a model in which only the variation of the IMF vector was taken into account. The results again support the hypothesis that the auroral oval at Saturn is associated with the open-closed field line boundary and hence with the solar wind interaction.

KW - Magnetospheric physics

U2 - 10.5194/angeo-26-159-2008

DO - 10.5194/angeo-26-159-2008

M3 - Journal article

VL - 26

SP - 159

EP - 166

JO - Annales Geophysicae

JF - Annales Geophysicae

SN - 0992-7689

IS - 1

ER -