Preferred Bartels Days of High Speed Plasma Streams in the Solar Wind
Abstract
An analysis of 346 high-speed solar wind streams observed at 1 AU during 1964-75 is presented. The analysis shows that a two-sector structure was the dominant feature of the interplanetary magnetic field associated with the high-speed solar wind plasma. The high-speed streams occurred at preferred Bartels days: Positive polarity streams were most frequent near Bartels day 4, negative polarity streams were most frequent near Bartels day 17. Since the solar wind carries with it the photospheric magnetic polarity of the solar source region, the observed distribution of Bartels days must indicate a fundamental property of the distribution of the solar sources of high-speed plasma streams. The observations are explained in terms of a tilted dipole model of the solar-interplanetary field.
- Publication:
-
Solar Physics
- Pub Date:
- November 1981
- DOI:
- 10.1007/BF00151289
- Bibcode:
- 1981SoPh...74..187L
- Keywords:
-
- Magnetohydrodynamic Flow;
- Plasma Dynamics;
- Solar Wind Velocity;
- High Speed;
- Interplanetary Magnetic Fields;
- Polarity;
- Twenty-Seven Day Variation;
- Solar Physics;
- Solar Wind;
- Solar Source;
- Interplanetary Magnetic Field;
- Negative Polarity;
- Magnetic Polarity