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Venus tail ray observation near Earth

Livi, S.; Hsieh, K. C.; Wurz, P. +23 more

In June, 1996, Venus passed through a very close inferior conjunction with the Sun. At that time the CTOF detector of the CELIAS mass spectrometer experiment on the SOHO spacecraft near Earth's L1 Lagrangian point was measuring heavy ions in the solar wind ∼4.5 × 10⁷ km downstream of Venus. Close to the time predicted by simple geometri…

Is the geoeffectiveness of the 6 January 1997 CME predictable from solar observations?

Hoeksema, J. T.; Zhao, X. P.

We present a prediction scheme for specifying the duration and maximum strength of the southward IMF within a magnetic cloud from observations of the disappearing filament associated with the coronal mass ejection and the photospheric magnetic field made near the filament disappearing. Using this scheme we were able to predict that the Earth direc…

The Lyman-α line from the solar wind acceleration region: Results from an eight-moment approximation two-fluid solar wind model

Olsen, Espen Lyngdal

We investigate neutral hydrogen in an eight-moment, two-fluid, high speed solar wind model. In this model the proton heat flux decreases rapidly in the solar wind acceleration region, and extended coronal heating of the proton gas leads to high coronal proton temperatures and large solar wind flow speeds. The properties of the Lyman-α line from th…