Electron oscillations in the induced martian magnetosphere

J. D. Winningham; R. A. Frahm; J. R. Sharber; A. J. Coates; D. R. Linder; Y. Soobiah; E. Kallio; J. R. Espley; R. Lundin; S. Barabash; M. Holmström; H. Andersson; M. Yamauchi; A. Grigoriev; J. R. Scherrer; S. J. Jeffers; D. O. Kataria; J. U. Kozyra; J. G. Luhmann; E. C. Roelof; D. J. Williams; S. Livi; C. C. Curtis; K. C. Hsieh; B. R. Sandel; H. Koskinen; T. Säles; P. Riihelä; W. Schmidt; M. Grande; M. Carter; J. A. Sauvaud; A. Fedorov; J. J. Thocaven; S. McKenna-Lawler; S. Orsini; R. Cerulli-Irelli; M. Maggi; P. Wurz; P. Bochsler; N. Krupp; J. Woch; M. Fränz; K. Asamura; C. Dierker

doi:10.1016/j.icarus.2005.10.033

Electron oscillations in the induced martian magnetosphere

J. D. Winningham^*, R. A. Frahm, J. R. Sharber, A. J. Coates, D. R. Linder, Y. Soobiah, E. Kallio, J. R. Espley, R. Lundin, S. Barabash, M. Holmström, H. Andersson, M. Yamauchi, A. Grigoriev, J. R. Scherrer, S. J. Jeffers, D. O. Kataria, J. U. Kozyra, J. G. Luhmann, E. C. RoelofD. J. Williams, S. Livi, C. C. Curtis, K. C. Hsieh, B. R. Sandel, H. Koskinen, T. Säles, P. Riihelä, W. Schmidt, M. Grande, M. Carter, J. A. Sauvaud, A. Fedorov, J. J. Thocaven, S. McKenna-Lawler, S. Orsini, R. Cerulli-Irelli, M. Maggi, P. Wurz, P. Bochsler, N. Krupp, J. Woch, M. Fränz, K. Asamura, C. Dierker

^*Corresponding author for this work

Department of Physics

Research output: Contribution to journal › Article › peer-review

50 Citations (Scopus)

Abstract

The Analyzer of Space Plasmas and Energetic Atoms (ASPERA-3) experiment flown on the Mars Express (MEX) spacecraft includes the Electron Spectrometer (ELS) as part of its complement. The ELS instrument measures the differential electron flux spectrum in a 128-level logarithmic energy sweep within a time period of 4 s. The orbital path of MEX traverses the martian sheath, cusps, and tail where ELS recorded periodic electron intensity oscillations. These oscillations comprised periodic variations of up to an order of magnitude (peak to valley) in energy flux, with the largest amplitudes in the tens to hundreds of eV range. The observed oscillations displayed periods ranging from minutes down to the instrument sweep resolution of 4 s. In the cases analyzed here, the frequency of the integrated electron energy flux typically peaked between 0.01 and 0.02 Hz. This frequency range is nearly the same as the typical O⁺ gyrofrequency in the magnetosheath, calculated using magnetometer data from Mars Global Surveyor. Due to the motion of the spacecraft, it is unclear if the wave structures observed were permanent standing waves or rather constituted waves propagating past the spacecraft.

Original language	English
Pages (from-to)	360-370
Number of pages	11
Journal	Icarus
Volume	182
Issue number	2
DOIs	https://doi.org/10.1016/j.icarus.2005.10.033
Publication status	Published - Jun 2006

Keywords

Magnetosphere
Mars

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Winningham, J. D., Frahm, R. A., Sharber, J. R., Coates, A. J., Linder, D. R., Soobiah, Y., Kallio, E., Espley, J. R., Lundin, R., Barabash, S., Holmström, M., Andersson, H., Yamauchi, M., Grigoriev, A., Scherrer, J. R., Jeffers, S. J., Kataria, D. O., Kozyra, J. U., Luhmann, J. G., ... Dierker, C. (2006). Electron oscillations in the induced martian magnetosphere. Icarus, 182(2), 360-370. https://doi.org/10.1016/j.icarus.2005.10.033

@article{bfd45ca780b040aaa9f2799ced369228,

title = "Electron oscillations in the induced martian magnetosphere",

abstract = "The Analyzer of Space Plasmas and Energetic Atoms (ASPERA-3) experiment flown on the Mars Express (MEX) spacecraft includes the Electron Spectrometer (ELS) as part of its complement. The ELS instrument measures the differential electron flux spectrum in a 128-level logarithmic energy sweep within a time period of 4 s. The orbital path of MEX traverses the martian sheath, cusps, and tail where ELS recorded periodic electron intensity oscillations. These oscillations comprised periodic variations of up to an order of magnitude (peak to valley) in energy flux, with the largest amplitudes in the tens to hundreds of eV range. The observed oscillations displayed periods ranging from minutes down to the instrument sweep resolution of 4 s. In the cases analyzed here, the frequency of the integrated electron energy flux typically peaked between 0.01 and 0.02 Hz. This frequency range is nearly the same as the typical O+ gyrofrequency in the magnetosheath, calculated using magnetometer data from Mars Global Surveyor. Due to the motion of the spacecraft, it is unclear if the wave structures observed were permanent standing waves or rather constituted waves propagating past the spacecraft.",

keywords = "Magnetosphere, Mars",

author = "Winningham, {J. D.} and Frahm, {R. A.} and Sharber, {J. R.} and Coates, {A. J.} and Linder, {D. R.} and Y. Soobiah and E. Kallio and Espley, {J. R.} and R. Lundin and S. Barabash and M. Holmstr{\"o}m and H. Andersson and M. Yamauchi and A. Grigoriev and Scherrer, {J. R.} and Jeffers, {S. J.} and Kataria, {D. O.} and Kozyra, {J. U.} and Luhmann, {J. G.} and Roelof, {E. C.} and Williams, {D. J.} and S. Livi and Curtis, {C. C.} and Hsieh, {K. C.} and Sandel, {B. R.} and H. Koskinen and T. S{\"a}les and P. Riihel{\"a} and W. Schmidt and M. Grande and M. Carter and Sauvaud, {J. A.} and A. Fedorov and Thocaven, {J. J.} and S. McKenna-Lawler and S. Orsini and R. Cerulli-Irelli and M. Maggi and P. Wurz and P. Bochsler and N. Krupp and J. Woch and M. Fr{\"a}nz and K. Asamura and C. Dierker",

note = "Funding Information: The ASPERA-3 experiment on the European Space Agency (ESA) Mars Express mission is a joint effort between 15 laboratories in 10 countries, all sponsored by their national agencies. We thank all these agencies as well as the various departments/institutes hosting these efforts. We wish to acknowledge support of NASA Contract NASW00003 for the support of the design, construction, operation, and data analysis for the Electron Spectrometer through the Discovery Program Mission of Opportunity. We also wish to acknowledge the Swedish National Space Board for their support of the main PI-institute and we are indebted to ESA for their courage in embarking on the Mars Express program, the first ESA mission to the red planet. Copyright: Copyright 2006 Elsevier B.V., All rights reserved.",

year = "2006",

month = jun,

doi = "10.1016/j.icarus.2005.10.033",

language = "English",

volume = "182",

pages = "360--370",

journal = "Icarus",

issn = "0019-1035",

publisher = "Elsevier",

number = "2",

}

Winningham, JD, Frahm, RA, Sharber, JR, Coates, AJ, Linder, DR, Soobiah, Y, Kallio, E, Espley, JR, Lundin, R, Barabash, S, Holmström, M, Andersson, H, Yamauchi, M, Grigoriev, A, Scherrer, JR, Jeffers, SJ, Kataria, DO, Kozyra, JU, Luhmann, JG, Roelof, EC, Williams, DJ, Livi, S, Curtis, CC, Hsieh, KC, Sandel, BR, Koskinen, H, Säles, T, Riihelä, P, Schmidt, W, Grande, M, Carter, M, Sauvaud, JA, Fedorov, A, Thocaven, JJ, McKenna-Lawler, S, Orsini, S, Cerulli-Irelli, R, Maggi, M, Wurz, P, Bochsler, P, Krupp, N, Woch, J, Fränz, M, Asamura, K & Dierker, C 2006, 'Electron oscillations in the induced martian magnetosphere', Icarus, vol. 182, no. 2, pp. 360-370. https://doi.org/10.1016/j.icarus.2005.10.033

TY - JOUR

T1 - Electron oscillations in the induced martian magnetosphere

AU - Winningham, J. D.

AU - Frahm, R. A.

AU - Sharber, J. R.

AU - Coates, A. J.

AU - Linder, D. R.

AU - Soobiah, Y.

AU - Kallio, E.

AU - Espley, J. R.

AU - Lundin, R.

AU - Barabash, S.

AU - Holmström, M.

AU - Andersson, H.

AU - Yamauchi, M.

AU - Grigoriev, A.

AU - Scherrer, J. R.

AU - Jeffers, S. J.

AU - Kataria, D. O.

AU - Kozyra, J. U.

AU - Luhmann, J. G.

AU - Roelof, E. C.

AU - Williams, D. J.

AU - Livi, S.

AU - Curtis, C. C.

AU - Hsieh, K. C.

AU - Sandel, B. R.

AU - Koskinen, H.

AU - Säles, T.

AU - Riihelä, P.

AU - Schmidt, W.

AU - Grande, M.

AU - Carter, M.

AU - Sauvaud, J. A.

AU - Fedorov, A.

AU - Thocaven, J. J.

AU - McKenna-Lawler, S.

AU - Orsini, S.

AU - Cerulli-Irelli, R.

AU - Maggi, M.

AU - Wurz, P.

AU - Bochsler, P.

AU - Krupp, N.

AU - Woch, J.

AU - Fränz, M.

AU - Asamura, K.

AU - Dierker, C.

N1 - Funding Information: The ASPERA-3 experiment on the European Space Agency (ESA) Mars Express mission is a joint effort between 15 laboratories in 10 countries, all sponsored by their national agencies. We thank all these agencies as well as the various departments/institutes hosting these efforts. We wish to acknowledge support of NASA Contract NASW00003 for the support of the design, construction, operation, and data analysis for the Electron Spectrometer through the Discovery Program Mission of Opportunity. We also wish to acknowledge the Swedish National Space Board for their support of the main PI-institute and we are indebted to ESA for their courage in embarking on the Mars Express program, the first ESA mission to the red planet. Copyright: Copyright 2006 Elsevier B.V., All rights reserved.

PY - 2006/6

Y1 - 2006/6

N2 - The Analyzer of Space Plasmas and Energetic Atoms (ASPERA-3) experiment flown on the Mars Express (MEX) spacecraft includes the Electron Spectrometer (ELS) as part of its complement. The ELS instrument measures the differential electron flux spectrum in a 128-level logarithmic energy sweep within a time period of 4 s. The orbital path of MEX traverses the martian sheath, cusps, and tail where ELS recorded periodic electron intensity oscillations. These oscillations comprised periodic variations of up to an order of magnitude (peak to valley) in energy flux, with the largest amplitudes in the tens to hundreds of eV range. The observed oscillations displayed periods ranging from minutes down to the instrument sweep resolution of 4 s. In the cases analyzed here, the frequency of the integrated electron energy flux typically peaked between 0.01 and 0.02 Hz. This frequency range is nearly the same as the typical O+ gyrofrequency in the magnetosheath, calculated using magnetometer data from Mars Global Surveyor. Due to the motion of the spacecraft, it is unclear if the wave structures observed were permanent standing waves or rather constituted waves propagating past the spacecraft.

AB - The Analyzer of Space Plasmas and Energetic Atoms (ASPERA-3) experiment flown on the Mars Express (MEX) spacecraft includes the Electron Spectrometer (ELS) as part of its complement. The ELS instrument measures the differential electron flux spectrum in a 128-level logarithmic energy sweep within a time period of 4 s. The orbital path of MEX traverses the martian sheath, cusps, and tail where ELS recorded periodic electron intensity oscillations. These oscillations comprised periodic variations of up to an order of magnitude (peak to valley) in energy flux, with the largest amplitudes in the tens to hundreds of eV range. The observed oscillations displayed periods ranging from minutes down to the instrument sweep resolution of 4 s. In the cases analyzed here, the frequency of the integrated electron energy flux typically peaked between 0.01 and 0.02 Hz. This frequency range is nearly the same as the typical O+ gyrofrequency in the magnetosheath, calculated using magnetometer data from Mars Global Surveyor. Due to the motion of the spacecraft, it is unclear if the wave structures observed were permanent standing waves or rather constituted waves propagating past the spacecraft.

KW - Magnetosphere

KW - Mars

UR - http://www.scopus.com/inward/record.url?scp=33747336799&partnerID=8YFLogxK

U2 - 10.1016/j.icarus.2005.10.033

DO - 10.1016/j.icarus.2005.10.033

M3 - Article

AN - SCOPUS:33747336799

SN - 0019-1035

VL - 182

SP - 360

EP - 370

JO - Icarus

JF - Icarus

IS - 2

ER -

Electron oscillations in the induced martian magnetosphere

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