During 2000–2001, the Ulysses spacecraft executed its second rapid pass from very high southern to very high northern heliolatitudes. Unlike the previous fast latitude scan, the recent one occurred near the maximum in solar activity. The solar magnetic field reversal, as evidenced by heliospheric magnetic field data, occurred between Ulysses’s highest southern latitudes and highest northern latitudes. We examine the magnetic field structure of the solar polar regions by analyzing data returned by the magnetometer aboard Ulysses before and after the maximum southern and northern heliolatitude excursions. An attempt is made to infer the location of the heliospheric current sheet at high latitudes from these observations. The reversal of the magnetic field at the solar wind source surface is inferred to have occurred between November 2000 and August 2001, with the most likely time of reversal being early within that period.
Skip Nav Destination
Research Article| September 02 2003
Ulysses Observations of Changes in the Solar Polar Regions Around Solar Maximum
Geraint H. Jones;
AIP Conf. Proc. 679, 156–159 (2003)
Geraint H. Jones, André Balogh; Ulysses Observations of Changes in the Solar Polar Regions Around Solar Maximum. AIP Conf. Proc. 2 September 2003; 679 (1): 156–159. https://doi.org/10.1063/1.1618565
Download citation file: