日球内边界的定义

1.1972年以来,随着Pioneer 10、11,Helios 1、2和Voyager 1、2等飞船组先后上天,进入“深空”探测,太阳风等离子体和行星际磁场的实地测量的日心径范围已从以前的1AU附近扩展到0.3—30AU,太阳纬度范围也从以前的-7.5°— +7.5°扩大到-7.5— +16°. 

Inner Boundary of the Heliosphere

There is no extensively accepted definition for the inner boundary of the heliosphere although the nomenclature——heliosphere——is increasingly used in the scientific presentations inthe space physics. After commenting some definitions of the inner boundary, the alfvenic points are suggested to be the inner boundary of the heliosphere. The definition is consistent with the concept of the wind sphere, and convenient for determination of the angular momentum loss of the Sun by the solar wind.