A disconnection event in the ion tail of Comet Bradfield 1987s

Details A disconnection event in the ion tail of Comet Bradfield 1987s A disconnection event in the ion tail of Comet Bradfield 1987s

Aug 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988a%26a...202l..13c&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 202, no. 1-2, Aug. 1988, p. L13-L15.

Astronomy and Astrophysics

Astrophysics

4

Astronomical Photography, Comet Tails, Solar Wind, Angular Velocity, Interplanetary Medium, Wind Velocity

Scientific paper

Two blue-light plates taken at the Asiago Observatory on 1987 December 20 show a Disconnection Event (DE, Niedner and Brandt, 1978) in the ion tail of Comet Bradfield 1987s. The authors obtain a radial velocity of the disconnected tail of ≈40 km sec-1. The ion tail reorientation associated to the DE is interpreted in terms of the wind-shock theory and is most likely explained by a decrement of the ecliptic polar component of the solar wind velocity of ≈20 km sec-1. The corresponding turning rate of the ion tail is ≈2°hr-1.

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