HELIOSPHERIC MAGNETIC PARAMETERS AND SOLAR ACTIVITY
摘要
The response of heliospheric quantities to the solar phenomena is discussed in this paper from a statistical point of view. An important result obtained is that the magnetic parameters defined by some combinations of the heliosperic quantities including magnetic field intensity are the physical characteristics that measure, distinguish or identify the influence of various solar phenomena on the heliospherie. Among these magnetic parameters the ratio of the magnetic to thermal pressure μ_p is one of the heliospheric characteristics that measures the influence of sunspot activity, distinguishes especially the influence exerted by the major flare activity, but also identifies the predecessor in the ascending and maximum phases for the region with a stable high-speed stream from cornal hole in the post-maximum phases. The magnetic sonic speed C_(as) possesses a considerably stable helio-longitudinal distribution in all the phases of the solar cycle, which implies a common feature for the region with a magnetically strong stream in the ascending and maximum phases and the region with a stable high-speed stream in the post-maximum phases. The other magnetic parameters such as the Alfven wave speed C_a as well as the ratios of the magnetic and total pressure to the kinetic energy density μk and Π_k~* respectively, reflect also the above features to a certain extent.