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AGU: Geophysical Research Letters

 

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  • Planetology: Comets and Small Bodies: Interactions with solar wind plasma and fields

Abstract

GEOPHYSICAL RESEARCH LETTERS, VOL. 13, NO. 8, PP. 841-844, 1986
doi:10.1029/GL013i008p00841

Position and structure of the comet Halley bow shock: Vega‐ 1 and Vega‐2 measurements

A. A. Galeev

Space Research Institute, Moscow, USSR

B. E. Gribov

Space Research Institute, Moscow, USSR

T. Gombosi

Central Research Institute, Budapest, Hungary

K. I. Gringauz

Space Research Institute, Moscow, USSR

S. I. Klimov

Space Research Institute, Moscow, USSR

P. Oberz

Center for Space Research, Warsaw, Poland

A. P. Remizov

Space Research Institute, Moscow, USSR

W. Riedler

Space Research Institute, Graz, Austria

R. Z. Sagdeev

Space Research Institute, Moscow, USSR

S. P. Savin

Space Research Institute, Moscow, USSR

A. Yu. Sokolov

Space Research Institute, Moscow, USSR

V. D. Shapiro

Space Research Institute, Moscow, USSR

V. I. Shevchenko

Space Research Institute, Moscow, USSR

K. Szego

Central Research Institute, Budapest, Hungary

M. I. Verigin

Space Research Institute, Moscow, USSR

Ye. G. Yeroshenko

IZMIRAN, Troitsk, USSR

The effect of solar wind loading by cometary ions on the position and structure of the comet Halley bow shock is discussed on the basis of simultaneous measurements of plasma, magnetic field and plasma waves aboard the "Vega‐1" and "Vega‐2" spacecraft. Data from the inbound crossings of the bow shock show that both quasiperpendiuclar ("Vega‐1") and quasiparallel ("Vega‐2") shocks were observed. The thickness of these shocks is greater than that of the Earth's bow shock at least by the ratio of the masses of cometary ions and protons. The bow shock position is reasonably well described by the kinetic model of solar wind loading by cometary ions.

Received 23 June 1986; accepted 10 July 1986; .

Citation: Galeev, A. A., et al. (1986), Position and structure of the comet Halley bow shock: Vega‐ 1 and Vega‐2 measurements, Geophys. Res. Lett., 13(8), 841–844, doi:10.1029/GL013i008p00841.

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