Analysis of the heliospheric current sheet fine structure: Single or multiple current sheets

Details Analysis of the heliospheric current sheet fine structure: Single or multiple current sheets Analysis of the heliospheric current sheet fine structure: Single or multiple current sheets

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006jastp..68.2173b&link_type=abstract

Journal of Atmospheric and Solar-Terrestrial Physics, Volume 68, Issue 18, p. 2173-2181.

Physics

5

Scientific paper

When studying the heliospheric current sheet (HCS) local structure, it is not unusual to find wide HCS crossings. In this paper, we present one crossing that appears to have a complex internal structure composed of three parallel sheets and several possible HCS crossings that are consecutive and are on the order of minutes. Depending on their origin, different scenarios can explain multiple current sheets such as complex structures of helmet streamer at the Corona flowing into the solar wind, local waviness in the HCS structure, local oscillations of the HCS, and inverted magnetic fields or planar magnetic structures (PMS) close to the HCS. Distinguishing among these scenarios using just one observational point is very difficult because all of them are 3D structures. Nevertheless, we think that nearly parallel sheets are more likely in the first and in the last scenarios, i.e. multiple helmet streamer structure and PMS. In order to make the distinction between them, we have studied the possible reversal in the Qe·B sign for every event. Our results suggest that the existence of not-wide HCS composed of multiple parallel sheets cannot be rejected.

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