Leakage ions from the LLBL to MSBL: Confirmation of reconnection events at the dayside magnetopause

M. Nakamura, T. Terasawa, H. Kawano, M. Fujimoto, M. Hirahara, T. Mukai, S. Machida, Y. Saito, S. Kokubun, T. Yamamoto, K. Tsuruda

Research output: Contribution to journalArticle

Abstract

This letter reports on leakage ions from the low latitude boundary layer (LLBL) to the magnetosheath boundary layer (MSBL) as observed by Geotail at the dayside magnetopause. A reconnection of the interplanetary magnetic field (IMF) with magnetospheric field lines is shown to be responsible for the leakage. Based on analysis of a variation in lower cut-off levels occurring in the velocity distribution function of the leakage ions, we propose a "velocity filter effect" model with a finite source region to explain this variation. The location of the reconnection region is subsequently calculated to be 2.2RE north of the geomagnetic equatorial plane under the proposed velocity filter effect model.

Original languageEnglish
Pages (from-to)65-70
Number of pages6
Journalearth, planets and space
Volume48
Issue number1
Publication statusPublished - Jan 1 1996
Externally publishedYes

Fingerprint

magnetosheath
magnetopause
tropical regions
leakage
boundary layers
boundary layer
ion
filter
filters
ions
interplanetary magnetic fields
cut-off
velocity distribution
distribution functions
magnetic field
effect

All Science Journal Classification (ASJC) codes

  • Geology
  • Space and Planetary Science

Cite this

Nakamura, M., Terasawa, T., Kawano, H., Fujimoto, M., Hirahara, M., Mukai, T., ... Tsuruda, K. (1996). Leakage ions from the LLBL to MSBL: Confirmation of reconnection events at the dayside magnetopause. earth, planets and space, 48(1), 65-70.

Leakage ions from the LLBL to MSBL : Confirmation of reconnection events at the dayside magnetopause. / Nakamura, M.; Terasawa, T.; Kawano, H.; Fujimoto, M.; Hirahara, M.; Mukai, T.; Machida, S.; Saito, Y.; Kokubun, S.; Yamamoto, T.; Tsuruda, K.

In: earth, planets and space, Vol. 48, No. 1, 01.01.1996, p. 65-70.

Research output: Contribution to journalArticle

Nakamura, M, Terasawa, T, Kawano, H, Fujimoto, M, Hirahara, M, Mukai, T, Machida, S, Saito, Y, Kokubun, S, Yamamoto, T & Tsuruda, K 1996, 'Leakage ions from the LLBL to MSBL: Confirmation of reconnection events at the dayside magnetopause', earth, planets and space, vol. 48, no. 1, pp. 65-70.
Nakamura M, Terasawa T, Kawano H, Fujimoto M, Hirahara M, Mukai T et al. Leakage ions from the LLBL to MSBL: Confirmation of reconnection events at the dayside magnetopause. earth, planets and space. 1996 Jan 1;48(1):65-70.
Nakamura, M. ; Terasawa, T. ; Kawano, H. ; Fujimoto, M. ; Hirahara, M. ; Mukai, T. ; Machida, S. ; Saito, Y. ; Kokubun, S. ; Yamamoto, T. ; Tsuruda, K. / Leakage ions from the LLBL to MSBL : Confirmation of reconnection events at the dayside magnetopause. In: earth, planets and space. 1996 ; Vol. 48, No. 1. pp. 65-70.
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