First in situ plasma and neutral gas measurements at comet Halley

K. I. Gringauz, T. I. Gombosi, A. P. Remizov, I. Apáthy, I. Szemerey, M. I. Verigin, L. I. Denchikova, A. V. Dyachkov, E. Keppler, I. N. Klimenko, A. K. Richter, A. J. Somogyi, K. Szegö, S. Szendro, M. Tátrallyay, A. Varga, G. A. Vladimirova

Research output: Article

110 Citations (Scopus)

Abstract

We present the first in situ observations and a description of the large-scale behaviour of comet Halley's plasma environment. The PLASMAG-1 experiment, carried aboard the spacecraft Vega 1 and Vega 2, had the following aims: (1) To study the change of plasma parameters and distributions as a function of distance from the nucleus; (2) to investigate the existence and structure of the cometary bow shock; (3) to determine the change in chemical composition of the heavily mass-loaded plasma as the spacecraft approached the comet; and (4) to measure the neutral gas distribution along the spacecraft trajectory. We observe a discontinuity (the 'cometopause') between the solar-wind-controlled cometosheath and heavy-ion mantle and the magnetized cometary plasma region. From the measured neutral gas density distribution we estimate a total gas production rate of 1.3×1030 molecules s-1.

Original languageEnglish
Pages (from-to)282-285
Number of pages4
JournalNature
Volume321
Issue number6067
DOIs
Publication statusPublished - 1986

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Halley's comet
neutral gases
gases
spacecraft
spacecraft trajectories
gas density
bows
comets
solar wind
density distribution
discontinuity
heavy ions
chemical composition
Earth mantle
shock
nuclei
estimates
molecules

ASJC Scopus subject areas

  • General

Cite this

Gringauz, K. I., Gombosi, T. I., Remizov, A. P., Apáthy, I., Szemerey, I., Verigin, M. I., ... Vladimirova, G. A. (1986). First in situ plasma and neutral gas measurements at comet Halley. Nature, 321(6067), 282-285. https://doi.org/10.1038/321282a0

First in situ plasma and neutral gas measurements at comet Halley. / Gringauz, K. I.; Gombosi, T. I.; Remizov, A. P.; Apáthy, I.; Szemerey, I.; Verigin, M. I.; Denchikova, L. I.; Dyachkov, A. V.; Keppler, E.; Klimenko, I. N.; Richter, A. K.; Somogyi, A. J.; Szegö, K.; Szendro, S.; Tátrallyay, M.; Varga, A.; Vladimirova, G. A.

In: Nature, Vol. 321, No. 6067, 1986, p. 282-285.

Research output: Article

Gringauz, KI, Gombosi, TI, Remizov, AP, Apáthy, I, Szemerey, I, Verigin, MI, Denchikova, LI, Dyachkov, AV, Keppler, E, Klimenko, IN, Richter, AK, Somogyi, AJ, Szegö, K, Szendro, S, Tátrallyay, M, Varga, A & Vladimirova, GA 1986, 'First in situ plasma and neutral gas measurements at comet Halley', Nature, vol. 321, no. 6067, pp. 282-285. https://doi.org/10.1038/321282a0
Gringauz KI, Gombosi TI, Remizov AP, Apáthy I, Szemerey I, Verigin MI et al. First in situ plasma and neutral gas measurements at comet Halley. Nature. 1986;321(6067):282-285. https://doi.org/10.1038/321282a0
Gringauz, K. I. ; Gombosi, T. I. ; Remizov, A. P. ; Apáthy, I. ; Szemerey, I. ; Verigin, M. I. ; Denchikova, L. I. ; Dyachkov, A. V. ; Keppler, E. ; Klimenko, I. N. ; Richter, A. K. ; Somogyi, A. J. ; Szegö, K. ; Szendro, S. ; Tátrallyay, M. ; Varga, A. ; Vladimirova, G. A. / First in situ plasma and neutral gas measurements at comet Halley. In: Nature. 1986 ; Vol. 321, No. 6067. pp. 282-285.
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AU - Szemerey, I.

AU - Verigin, M. I.

AU - Denchikova, L. I.

AU - Dyachkov, A. V.

AU - Keppler, E.

AU - Klimenko, I. N.

AU - Richter, A. K.

AU - Somogyi, A. J.

AU - Szegö, K.

AU - Szendro, S.

AU - Tátrallyay, M.

AU - Varga, A.

AU - Vladimirova, G. A.

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