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Detailed Reference Information |
Verigin, M.I., Gringauz, K.I. and Ness, N.F. (1984). Comparison of induced magnetospheres at Venus and Titan. Journal of Geophysical Research 89. doi: 10.1029/JA089iA07p05461. issn: 0148-0227. |
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Considerable evidence exists from data obtained by artificial satellites of Venus describing the detached bow shock wave which develops at Venus due to the interaction of the super-Alfvenic, supersonic solar wind. However, there is no such direct evidence for any bow shock wave at Titan due to the interaction with the corotating Saturnian magnetosphere. This is because the fast mode MHD Mach number was less than unity at the time of Voyager 1 close flyby. In spite of this difference in plasma regimes, there is a certain striking similarity in these two interactions. (1) Both obstacles to plasma flow have appreciable ionospheres and are globally nonmagnetic. (2) Downstream from both obstacles, an induced bipolar magnetic tail is formed with a central field reversal region which is analogous to the earth's neutral sheet-plasma sheet region. This paper will discuss plasma and magnetic field data from the Venera 9 and 10 spacecraft at Venus and from Voyager 1 at Titan which lead to new conclusions regarding the magnetic tail structure of their induced magnetospheres: (3) There appears to be evidence for magnetic reconnection between the oppositely directed tail lobes occurs. The single tail crossing at Titan shows evidence of merging while the repeated tail crossings at Venus indicate that similarly observed merging there is not a permanent feature. |
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Publisher
American Geophysical Union 2000 Florida Avenue N.W. Washington, D.C. 20009-1277 USA 1-202-462-6900 1-202-328-0566 service@agu.org |
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