Dual periodicities in the flapping of Saturn's magnetodisk

K. Szegö, Z. Nemeth, L. Foldy, S. W H Cowley, G. Provan

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

In this report, we modify the model of Arridge et al. (2011) which was proposed to describe the shape of the magnetodisk of Saturn and its north-south oscillations near the planetary rotation period. The modification is based on the recent results of Provan et al. (2011, 2012) and Andrews et al. (2012), who have shown that the magnetic modulations near the current sheet exhibit dual periodicities, and derived magnetic phase functions for the northern and southern period modulations from the magnetic field data. Using a modified model in which the effects of both modulations are included, specifically related to the modulations of the radial component of the magnetic field, we show that the oscillations can be modeled without the use of an arbitrarily assigned oscillation phase value as employed in the previous work of Szego et al. (2012). In addition, the best fit amplitudes of the two oscillations are found to be nearly constant for a majority of the magnetodisk data analyzed, such that a single model with one fixed parameter fits well to the data for a majority of the passes. Key Points We present a modified model for magnetodisk flapping This is based on new recently derived magnetic field modulation phases The model provides a good fit to CAPS numerical ion moments

Original languageEnglish
Pages (from-to)2883-2887
Number of pages5
JournalJournal of Geophysical Research: Space Physics
Volume118
Issue number6
DOIs
Publication statusPublished - 2013

Fingerprint

flapping
Saturn
periodicity
periodic variations
oscillation
magnetic fields
Modulation
modulation
oscillations
Magnetic fields
magnetic field
planetary rotation
Phase modulation
current sheets
phase modulation
Ions
ions
moments
ion

Keywords

  • flapping
  • magnetodisk
  • Saturn

ASJC Scopus subject areas

  • Space and Planetary Science
  • Geophysics

Cite this

Dual periodicities in the flapping of Saturn's magnetodisk. / Szegö, K.; Nemeth, Z.; Foldy, L.; Cowley, S. W H; Provan, G.

In: Journal of Geophysical Research: Space Physics, Vol. 118, No. 6, 2013, p. 2883-2887.

Research output: Contribution to journalArticle

Szegö, K. ; Nemeth, Z. ; Foldy, L. ; Cowley, S. W H ; Provan, G. / Dual periodicities in the flapping of Saturn's magnetodisk. In: Journal of Geophysical Research: Space Physics. 2013 ; Vol. 118, No. 6. pp. 2883-2887.
@article{2c5a3408d94a4be1ac97646ae8219ad4,
title = "Dual periodicities in the flapping of Saturn's magnetodisk",
abstract = "In this report, we modify the model of Arridge et al. (2011) which was proposed to describe the shape of the magnetodisk of Saturn and its north-south oscillations near the planetary rotation period. The modification is based on the recent results of Provan et al. (2011, 2012) and Andrews et al. (2012), who have shown that the magnetic modulations near the current sheet exhibit dual periodicities, and derived magnetic phase functions for the northern and southern period modulations from the magnetic field data. Using a modified model in which the effects of both modulations are included, specifically related to the modulations of the radial component of the magnetic field, we show that the oscillations can be modeled without the use of an arbitrarily assigned oscillation phase value as employed in the previous work of Szego et al. (2012). In addition, the best fit amplitudes of the two oscillations are found to be nearly constant for a majority of the magnetodisk data analyzed, such that a single model with one fixed parameter fits well to the data for a majority of the passes. Key Points We present a modified model for magnetodisk flapping This is based on new recently derived magnetic field modulation phases The model provides a good fit to CAPS numerical ion moments",
keywords = "flapping, magnetodisk, Saturn",
author = "K. Szeg{\"o} and Z. Nemeth and L. Foldy and Cowley, {S. W H} and G. Provan",
year = "2013",
doi = "10.1002/jgra.50316",
language = "English",
volume = "118",
pages = "2883--2887",
journal = "Journal of Geophysical Research",
issn = "0148-0227",
publisher = "American Geophysical Union",
number = "6",

}

TY - JOUR

T1 - Dual periodicities in the flapping of Saturn's magnetodisk

AU - Szegö, K.

AU - Nemeth, Z.

AU - Foldy, L.

AU - Cowley, S. W H

AU - Provan, G.

PY - 2013

Y1 - 2013

N2 - In this report, we modify the model of Arridge et al. (2011) which was proposed to describe the shape of the magnetodisk of Saturn and its north-south oscillations near the planetary rotation period. The modification is based on the recent results of Provan et al. (2011, 2012) and Andrews et al. (2012), who have shown that the magnetic modulations near the current sheet exhibit dual periodicities, and derived magnetic phase functions for the northern and southern period modulations from the magnetic field data. Using a modified model in which the effects of both modulations are included, specifically related to the modulations of the radial component of the magnetic field, we show that the oscillations can be modeled without the use of an arbitrarily assigned oscillation phase value as employed in the previous work of Szego et al. (2012). In addition, the best fit amplitudes of the two oscillations are found to be nearly constant for a majority of the magnetodisk data analyzed, such that a single model with one fixed parameter fits well to the data for a majority of the passes. Key Points We present a modified model for magnetodisk flapping This is based on new recently derived magnetic field modulation phases The model provides a good fit to CAPS numerical ion moments

AB - In this report, we modify the model of Arridge et al. (2011) which was proposed to describe the shape of the magnetodisk of Saturn and its north-south oscillations near the planetary rotation period. The modification is based on the recent results of Provan et al. (2011, 2012) and Andrews et al. (2012), who have shown that the magnetic modulations near the current sheet exhibit dual periodicities, and derived magnetic phase functions for the northern and southern period modulations from the magnetic field data. Using a modified model in which the effects of both modulations are included, specifically related to the modulations of the radial component of the magnetic field, we show that the oscillations can be modeled without the use of an arbitrarily assigned oscillation phase value as employed in the previous work of Szego et al. (2012). In addition, the best fit amplitudes of the two oscillations are found to be nearly constant for a majority of the magnetodisk data analyzed, such that a single model with one fixed parameter fits well to the data for a majority of the passes. Key Points We present a modified model for magnetodisk flapping This is based on new recently derived magnetic field modulation phases The model provides a good fit to CAPS numerical ion moments

KW - flapping

KW - magnetodisk

KW - Saturn

UR - http://www.scopus.com/inward/record.url?scp=84883115781&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84883115781&partnerID=8YFLogxK

U2 - 10.1002/jgra.50316

DO - 10.1002/jgra.50316

M3 - Article

VL - 118

SP - 2883

EP - 2887

JO - Journal of Geophysical Research

JF - Journal of Geophysical Research

SN - 0148-0227

IS - 6

ER -