Physics
Scientific paper
May 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986natur.321..310o&link_type=abstract
Nature (ISSN 0028-0836), vol. 321, May 15, 1986, p. 310-313.
Physics
13
Cometary Atmospheres, Halley'S Comet, Interplanetary Magnetic Fields, Solar Wind, Space Plasmas, Deceleration, Giacobini-Zinner Comet, Ion Density (Concentration), Ion Temperature, Magnetic Clouds, Plasma Sheaths, Comets, Halley, Spacecraft Observations, Mission Description, Experiments, Solar Wind, Acceleration, Velocity, Ions, Density, Flow, Temperature, Sakigake, Magnetic Fields, Equipment, Parameters
Scientific paper
The velocity, ion density, flow direction and ion temperature of the solar-wind plasma were measured during Sakigake's approach to Comet Halley from March 10 to 13, with a distance of closest approach of 7 million km. Interplanetary magnetic field (IMF) observations show that Sakigake travelled through the solar plasma sheet and also through the lobes of the heliomagnetosphere (or through the magnetic cloud). At the time of the measurements, interplanetary space was undergoing a small disturbance caused by the two-stream solar wind with a 27-day periodicity. Although it is difficult to isolate an effect of the comet on solar-wind parameters from background disturbances, it remains possible that the solar wind was decelerated by the cometary atmosphere.
Hirano Takuya
Hirao Kimihiko
Oyama Koh-Ichiro
Saito Takesi
Yumoto Kiyo
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