Solar Wind Effects Associated with a Recurrent,High-Latitude Coronal Brightness Enhancement |
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| Authors: | Gary D Parker |
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| Institution: | (1) Department of Physics, Norwich University, Northfield, VT 05663, USA |
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| Abstract: | During the descent of Ulysses following the 2001 solar north pole passage, the SOHO LASCO C2 telescope recorded a particularly strong sequence of recurrent
polarization brightness (pB) features at latitudes of around 55°. As Ulysses passed overhead, solar rotation swept the interplanetary extensions of these persistent coronal structures over the spacecraft.
Comparison of solar remote sensing and Ulysses
in situ observations through 2002 reveals the solar wind effects of very bright and recurrent K-coronal structures at high solar
latitudes and of a steeply inclined heliospheric neutral sheet (HNS). Despite the high level of solar activity, the HNS at
high latitude still organizes solar wind stream structure much as it did near the previous solar minimum. The recurrent coronal
streamers originate slow solar wind and mark the northern extremity of a very tilted HNS whose passage at Ulysses is accompanied by slow, dense solar wind, enhanced temperature, depressed α abundance, enhanced magnetic fields, and magnetic field directional changes that evolve with spacecraft latitude. |
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| Keywords: | Corona Solar wind Heliospheric neutral sheet SOHO LASCO Ulysses |
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