Home > Research > Publications & Outputs > Current density in Saturn’s equatorial current ...

Electronic data

  • 836911_1_merged_pdf_6038476_pgsb1p

    Rights statement: Accepted for publication in Journal of Geophysical Research: Space Physics. Copyright 2019 American Geophysical Union. Further reproduction or electronic distribution is not permitted.

    Accepted author manuscript, 2.96 MB, PDF document

    Available under license: CC BY-NC: Creative Commons Attribution-NonCommercial 4.0 International License

Links

Text available via DOI:

View graph of relations

Current density in Saturn’s equatorial current sheet: Cassini magnetometer observations

Research output: Contribution to journalJournal articlepeer-review

Published

Standard

Current density in Saturn’s equatorial current sheet : Cassini magnetometer observations. / Martin, Carley; Arridge, Christopher Stephen.

In: Journal of Geophysical Research: Space Physics, Vol. 124, No. 1, 31.01.2019, p. 279-292.

Research output: Contribution to journalJournal articlepeer-review

Harvard

APA

Vancouver

Author

Martin, Carley ; Arridge, Christopher Stephen. / Current density in Saturn’s equatorial current sheet : Cassini magnetometer observations. In: Journal of Geophysical Research: Space Physics. 2019 ; Vol. 124, No. 1. pp. 279-292.

Bibtex

@article{715b66144342488d937771658fba3045,
title = "Current density in Saturn{\textquoteright}s equatorial current sheet: Cassini magnetometer observations",
abstract = "The equatorial current sheet at Saturn is the result of a rapidly rotating magnetosphere. The sheet itself exhibits periodic seasonal and diurnal movements as well as aperiodic movements of a currently unknown origin, along with periodic thickening and thinning of the magnetodisc, and azimuthal changes in the thickness due to local effects in the magnetosphere. In this paper aperiodic movements of the magnetodisc are utilized to calculate the height‐integrated current density of the current sheet using a Harris current sheet model deformed by a Gaussian wave function. We find a local time asymmetry in both the radial and azimuthal height‐integrated current density. We note that the local time relationship with height‐integrated current density is similar to the relationship seen at Jupiter, where a peak of ∼0.04 A/m at ∼3 SLT (Saturn local time) is seen inside 20 RS. The divergence of the radial and azimuthal current densities are used to infer the parallel currents, which are seen to diverge from the equator in the prenoon sector and enter the equator in the premidnight sector.",
author = "Carley Martin and Arridge, {Christopher Stephen}",
note = "Accepted for publication in Journal of Geophysical Research: Space Physics. Copyright 2019 American Geophysical Union. Further reproduction or electronic distribution is not permitted.",
year = "2019",
month = jan,
day = "31",
doi = "10.1029/2018JA025970",
language = "English",
volume = "124",
pages = "279--292",
journal = "Journal of Geophysical Research: Space Physics",
issn = "2169-9402",
publisher = "Blackwell Publishing Ltd",
number = "1",

}

RIS

TY - JOUR

T1 - Current density in Saturn’s equatorial current sheet

T2 - Cassini magnetometer observations

AU - Martin, Carley

AU - Arridge, Christopher Stephen

N1 - Accepted for publication in Journal of Geophysical Research: Space Physics. Copyright 2019 American Geophysical Union. Further reproduction or electronic distribution is not permitted.

PY - 2019/1/31

Y1 - 2019/1/31

N2 - The equatorial current sheet at Saturn is the result of a rapidly rotating magnetosphere. The sheet itself exhibits periodic seasonal and diurnal movements as well as aperiodic movements of a currently unknown origin, along with periodic thickening and thinning of the magnetodisc, and azimuthal changes in the thickness due to local effects in the magnetosphere. In this paper aperiodic movements of the magnetodisc are utilized to calculate the height‐integrated current density of the current sheet using a Harris current sheet model deformed by a Gaussian wave function. We find a local time asymmetry in both the radial and azimuthal height‐integrated current density. We note that the local time relationship with height‐integrated current density is similar to the relationship seen at Jupiter, where a peak of ∼0.04 A/m at ∼3 SLT (Saturn local time) is seen inside 20 RS. The divergence of the radial and azimuthal current densities are used to infer the parallel currents, which are seen to diverge from the equator in the prenoon sector and enter the equator in the premidnight sector.

AB - The equatorial current sheet at Saturn is the result of a rapidly rotating magnetosphere. The sheet itself exhibits periodic seasonal and diurnal movements as well as aperiodic movements of a currently unknown origin, along with periodic thickening and thinning of the magnetodisc, and azimuthal changes in the thickness due to local effects in the magnetosphere. In this paper aperiodic movements of the magnetodisc are utilized to calculate the height‐integrated current density of the current sheet using a Harris current sheet model deformed by a Gaussian wave function. We find a local time asymmetry in both the radial and azimuthal height‐integrated current density. We note that the local time relationship with height‐integrated current density is similar to the relationship seen at Jupiter, where a peak of ∼0.04 A/m at ∼3 SLT (Saturn local time) is seen inside 20 RS. The divergence of the radial and azimuthal current densities are used to infer the parallel currents, which are seen to diverge from the equator in the prenoon sector and enter the equator in the premidnight sector.

U2 - 10.1029/2018JA025970

DO - 10.1029/2018JA025970

M3 - Journal article

VL - 124

SP - 279

EP - 292

JO - Journal of Geophysical Research: Space Physics

JF - Journal of Geophysical Research: Space Physics

SN - 2169-9402

IS - 1

ER -