Acceleration of cometary plasma in the vicinity of comet Halley associated with an interplanetary magnetic field polarity change

1987 ◽  
Vol 14 (10) ◽  
pp. 987-990 ◽  
Author(s):  
M. I. Verigin ◽  
W. I. Axford ◽  
K. I. Gringauz ◽  
A. K. Richter
Keyword(s):  
Magnetic Field ◽  
Interplanetary Magnetic Field ◽  
Field Polarity ◽  
Cometary Plasma ◽  
Comet Halley ◽  
Polarity Change

Interaction between comet Halley and the interplanetary magnetic field observed by Sakigake

Nature ◽  
1986 ◽  
Vol 321 (S6067) ◽  
pp. 303-307 ◽  
Author(s):  
Takao Saito ◽  
Kiyohumi Yumoto ◽  
Kunio Hirao ◽  
Tomoko Nakagawa ◽  
Keiji Saito
Keyword(s):  
Magnetic Field ◽  
Interplanetary Magnetic Field ◽  
Comet Halley

scholarly journals The Interaction of Cometary Plasma with Interplanetary Medium - A Post-Halley View

1990 ◽  
Vol 142 ◽  
pp. 429-434
Author(s):  
Debi Prasad
Keyword(s):  
Magnetic Field ◽  
Plasma Physics ◽  
Recent Work ◽  
Strong Interaction ◽  
Interplanetary Medium ◽  
Heliospheric Magnetic Field ◽  
Cometary Plasma ◽  
Plasma Tail ◽  
Comet Halley

The strong interaction of cometary plasma with the interplanetary medium results the disconnection events and other features observed in plasma tail and the coma of comets. The understanding of these features provide direct probe of the heliospheric magnetic field. However the interpretation of these events is not without ambiguity, as revealed in the recent work with comet Halley. In this paper a review of the “Post-Halley era” developments of the cometary plasma physics is presented.

Interplanetary Magnetic Field Polarity and the Size of Low-Pressure Troughs Near 180 W Longitude

Science ◽  
1979 ◽  
Vol 204 (4388) ◽  
pp. 60-62 ◽  
Author(s):  
J. M. WILCOX ◽  
P. B. DUFFY ◽  
K. H. SCHATTEN ◽  
L. SVALGAARD ◽  
P. H. SCHERRER ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Interplanetary Magnetic Field ◽  
Low Pressure ◽  
Field Polarity

scholarly journals Hybrid modeling of cometary plasma environments

2019 ◽  
Vol 630 ◽  
pp. A45 ◽  
Author(s):  
M. Alho ◽  
C. S. Wedlund ◽  
H. Nilsson ◽  
E. Kallio ◽  
R. Jarvinen ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Interplanetary Magnetic Field ◽  
Large Scale ◽  
Bow Shock ◽  
Particle Tracing ◽  
Cometary Plasma ◽  
Plasma Environment ◽  
Spectral Break ◽  
Hybrid Plasma ◽  
Magnetic Field Magnitude

Context. The ESA Rosetta probe has not seen direct evidence of a fully formed bow shock at comet 67P/Churyumov–Gerasimenko (67P). Ion spectrometer measurements of cometary pickup ions measured in the vicinity of the nucleus of 67P are available and may contain signatures of the large-scale plasma environment. Aims. The aim is to investigate the possibility of using pickup ion signatures to infer the existence or nonexistence of a bow shock-like structure and possibly other large-scale plasma environment features. Methods. A numerical plasma model in the hybrid plasma description was used to model the plasma environment of a comet. Simulated pickup ion spectra were generated for different interplanetary magnetic field conditions. The results were interpreted through test particle tracing in the hybrid simulation solutions. Results. Features of the observed pickup ion energy spectrum were reproduced, and the model was used to interpret the observation to be consistent with a shock-like structure. We identify (1) a spectral break related to the bow shock, (2) a mechanism for generating the spectral break, and (3) a dependency of the energy of the spectral break on the interplanetary magnetic field magnitude and bow shock standoff distance.

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