Physics
Scientific paper
Oct 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010soph..266..379z&link_type=abstract
Solar Physics, Volume 266, Issue 2, pp.379-390
Physics
2
Heliosphere, Heliospheric Base, Sun: Corona, Sun: Magnetic Field
Scientific paper
STEREO A and B observations of the radial magnetic field between 1 January 2007 and 31 October 2008 show significant evidence that in the heliosphere, the ambient radial magnetic field component with any dynamic effects removed is uniformly distributed. Based on this monopolar nature of the ambient heliospheric field we find that the surface beyond which the magnetic fields are in the monopolar configuration must be spherical, and this spherical surface can be defined as the inner boundary of the heliosphere that separates the monopole-dominated heliospheric magnetic field from the multipole-dominated coronal magnetic field. By using the radial variation of the coronal helmet streamers belts and the horizontal current - current sheet - source surface model we find that the spherical inner boundary of the heliosphere should be located around 14 solar radii near solar minimum phase.
Hoeksema Jon Todd
Zhao Xue Pu
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