Plasma tail of Comet Bradfield 1987s during 1987 October 19-20

Details Plasma tail of Comet Bradfield 1987s during 1987 October 19-20 Plasma tail of Comet Bradfield 1987s during 1987 October 19-20

Oct 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989em%26p...47...91c&link_type=abstract

Earth, Moon, and Planets (ISSN 0167-9295), vol. 47, Oct. 1989, p. 91-103.

Computer Science

Comet Tails, Shock Wave Interaction, Solar Activity Effects, Solar Wind, Space Plasmas, Geomagnetism, Kp Index, Plasma Clouds, Shock Wave Propagation, Solar Wind Velocity

Scientific paper

A large scale disturbance (LSD) ion plasma tail of Comet Bradfield 1987s has been observed in some wide field photographs taken in the days October 19-20, 1987. A conspicuous plasma 'cloud' moving along the tail axis is also visible. Wind-shock analysis shows that the LSD can be explained as the effect of a strong variation in the ecliptical polar component of solar wind speed. An analysis of solar activity suggests that the possible cause of the LSD is a solar burst occurred in October 1987 l6.4 (UT). Correlated geomagnetic effects are found on October 25-26 using corotation method. The plasma 'cloud' seems to have a mean speed of 280 km/s.

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