A pre-shock event at Jupiter on 30 January 2001

K. Szegö, David T. Young, Thorsten Bagdonat, Bruce Barraclough, Jean Jacques Berthelier, Andrew J. Coates, Frank J. Crary, Michele K. Dougherty, G. Erdős, Donald A. Gurnett, William S. Kurth, Andrea Opitz, Abi Rymer, Michelle F. Thomsen

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

In this paper we analyze a pre-shock event that we observed in the foot region of the quasi-parallel bow shock (BS) that the Cassini spacecraft crossed on 30 January 2001, at about 1030 UT. Before crossing the BS, the incoming solar wind first decelerated, and then the bulk velocity both of the proton and α components increased, the flow accelerated and decelerated, heated and cooled several times. We characterize the plasma in the foot using the data measured by the magnetometer, the radio and plasma wave science (RPWS) instrument, and the Cassini plasma spectrometer (CAPS) being carried onboard the Cassini spacecraft, and analyze the observations. We argue that the velocity and temperature changes can be caused by firehose instabilities excited by ions reflected from the shock. We investigate another possibility, shocklet formation, to account for the observed features, but conclude that this explanation seems to be less likely. In the foot we also identified both backstreaming electrons and ions and electrostatic waves in the 100-1000 Hz range very likely excited by the backstreaming electrons.

Original languageEnglish
Pages (from-to)200-211
Number of pages12
JournalPlanetary and Space Science
Volume54
Issue number2
DOIs
Publication statusPublished - Feb 2006

Fingerprint

Jupiter (planet)
Jupiter
shock
plasma
bows
spacecraft
electron
ion
magnetometer
electrostatic waves
solar wind
radio waves
spectrometer
plasma waves
magnetometers
radio
ions
electrons
spectrometers
protons

Keywords

  • Bow shock
  • Firehose instability
  • Foot region
  • Planetary magnetospheres

ASJC Scopus subject areas

  • Geophysics
  • Space and Planetary Science
  • Astronomy and Astrophysics

Cite this

Szegö, K., Young, D. T., Bagdonat, T., Barraclough, B., Berthelier, J. J., Coates, A. J., ... Thomsen, M. F. (2006). A pre-shock event at Jupiter on 30 January 2001. Planetary and Space Science, 54(2), 200-211. https://doi.org/10.1016/j.pss.2005.10.011

A pre-shock event at Jupiter on 30 January 2001. / Szegö, K.; Young, David T.; Bagdonat, Thorsten; Barraclough, Bruce; Berthelier, Jean Jacques; Coates, Andrew J.; Crary, Frank J.; Dougherty, Michele K.; Erdős, G.; Gurnett, Donald A.; Kurth, William S.; Opitz, Andrea; Rymer, Abi; Thomsen, Michelle F.

In: Planetary and Space Science, Vol. 54, No. 2, 02.2006, p. 200-211.

Research output: Contribution to journalArticle

Szegö, K, Young, DT, Bagdonat, T, Barraclough, B, Berthelier, JJ, Coates, AJ, Crary, FJ, Dougherty, MK, Erdős, G, Gurnett, DA, Kurth, WS, Opitz, A, Rymer, A & Thomsen, MF 2006, 'A pre-shock event at Jupiter on 30 January 2001', Planetary and Space Science, vol. 54, no. 2, pp. 200-211. https://doi.org/10.1016/j.pss.2005.10.011
Szegö K, Young DT, Bagdonat T, Barraclough B, Berthelier JJ, Coates AJ et al. A pre-shock event at Jupiter on 30 January 2001. Planetary and Space Science. 2006 Feb;54(2):200-211. https://doi.org/10.1016/j.pss.2005.10.011
Szegö, K. ; Young, David T. ; Bagdonat, Thorsten ; Barraclough, Bruce ; Berthelier, Jean Jacques ; Coates, Andrew J. ; Crary, Frank J. ; Dougherty, Michele K. ; Erdős, G. ; Gurnett, Donald A. ; Kurth, William S. ; Opitz, Andrea ; Rymer, Abi ; Thomsen, Michelle F. / A pre-shock event at Jupiter on 30 January 2001. In: Planetary and Space Science. 2006 ; Vol. 54, No. 2. pp. 200-211.
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