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Achilleos, N.; Arridge, C.S.; Bertucci, C.; Jackman, C.M.; Dougherty, M.K.; Khurana, K.K.; Russell, C.T. "Large-scale dynamics of Saturn's magnetopause: Observations by Cassini" (2008) Journal of Geophysical Research: Space Physics. 113(11)
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Abstract:

The long-term statistical behavior of the large-scale structure of Saturn's magnetosphere has been investigated. Established statistical techniques for Jupiter have been applied to the kronian system, employing Cassini magnetometer data and a new empirical shape model of the magnetopause based on these data. The resulting distribution of standoff distance RMP for Saturn, covering a time interval of ∼400 days, is well described by a "dual" or "bimodal" model-the sum of two normal distributions with different means at ∼22 and ∼27 planetary radii. We have made a comparison between the dual model's prediction for the probability distribution of solar wind dynamic pressure at Saturn with a sequence of observations from the Cassini Plasma Spectrometer (CAPS) instrument. Although the solar wind dynamic pressure observations are limited to a smaller time interval than the magnetometer data, we find that their overall range is in broad agreement with the that of the modeled pressures. However, the bimodal structure exhibited by the model is not apparent in the solar wind data for the corresponding range of dynamic pressures (∼0.008 - 0.06 nPa), which suggests that other mechanisms at Saturn also influence the size distribution of the magnetopause. Considering internal processes at Saturn and their influence on magnetopause size, we conclude that the effect of internal mass loading and loss from the magnetospheric disk is plausibly able to explain the observed bimodal distribution in magnetopause standoff distance. Copyright 2008 by the American Geophysical Union.

Registro:

Documento: Artículo
Título:Large-scale dynamics of Saturn's magnetopause: Observations by Cassini
Autor:Achilleos, N.; Arridge, C.S.; Bertucci, C.; Jackman, C.M.; Dougherty, M.K.; Khurana, K.K.; Russell, C.T.
Filiación:Atmospheric Physics Laboratory, Center for Planetary Sciences, University College London, London, United Kingdom
Blackett Laboratory, Imperial College London, London, United Kingdom
Mullard Space Science Laboratory, Center for Planetary Sciences, University College London, Holmbury St Mary, London, United Kingdom
Institute of Geophysics and Planetary Physics, University of California-Los Angeles, Los Angeles, CA, United States
Atmospheric Physics Laboratory, University College London, Gower Street, London WC1E 6BT, United Kingdom
Mullard Space Science Laboratory, Centre for Planetary Sciences, University College London, Holmbury St. Mary, Dorking, Surrey, RH5 6NT, United Kingdom
Institute for Astronomy and Space Physics (IAFE), Suc. 28, C1428AA Buenos Aires, Argentina
Space and Atmospheric Physics Group, Blackett Laboratory, Imperial College London, Prince Consort Road, London SW7 2BW, United Kingdom
Institute of Geophysics and Planetary Physics, University of California - Los Angeles, 3845 Slichter Hall, 603 Charles E. Young Drive, East, Los Angeles, CA 90095-1567, United States
Año:2008
Volumen:113
Número:11
DOI: http://dx.doi.org/10.1029/2008JA013265
Título revista:Journal of Geophysical Research: Space Physics
Título revista abreviado:J. Geophys. Res. A. Space Phys.
ISSN:21699402
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_21699402_v113_n11_p_Achilleos

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Citas:

---------- APA ----------
Achilleos, N., Arridge, C.S., Bertucci, C., Jackman, C.M., Dougherty, M.K., Khurana, K.K. & Russell, C.T. (2008) . Large-scale dynamics of Saturn's magnetopause: Observations by Cassini. Journal of Geophysical Research: Space Physics, 113(11).
http://dx.doi.org/10.1029/2008JA013265
---------- CHICAGO ----------
Achilleos, N., Arridge, C.S., Bertucci, C., Jackman, C.M., Dougherty, M.K., Khurana, K.K., et al. "Large-scale dynamics of Saturn's magnetopause: Observations by Cassini" . Journal of Geophysical Research: Space Physics 113, no. 11 (2008).
http://dx.doi.org/10.1029/2008JA013265
---------- MLA ----------
Achilleos, N., Arridge, C.S., Bertucci, C., Jackman, C.M., Dougherty, M.K., Khurana, K.K., et al. "Large-scale dynamics of Saturn's magnetopause: Observations by Cassini" . Journal of Geophysical Research: Space Physics, vol. 113, no. 11, 2008.
http://dx.doi.org/10.1029/2008JA013265
---------- VANCOUVER ----------
Achilleos, N., Arridge, C.S., Bertucci, C., Jackman, C.M., Dougherty, M.K., Khurana, K.K., et al. Large-scale dynamics of Saturn's magnetopause: Observations by Cassini. J. Geophys. Res. A. Space Phys. 2008;113(11).
http://dx.doi.org/10.1029/2008JA013265