Solar wind speed theory and the nonextensivity of solar corona
Abstract
The solar corona is a complex system, with nonisothermal plasma and being in the self-gravitating field of the Sun. So the corona plasma is not only a nonequilibrium system but also a nonextensive one. We estimate the parameter of describing the degree of nonextensivity of the corona plasma and study the generalization of the solar wind speed theory in the framework of nonextensive statistical mechanics. It is found that, when use Chapman's corona model (1957) as the radial distribution of the temperature in the corona, the nonextensivity reduces the gas pressure outward and thus leads a significant deceleration effect on the radial speed of the solar wind.
Keywords
Cite
@article{arxiv.0802.2170,
title = {Solar wind speed theory and the nonextensivity of solar corona},
author = {Jiulin Du and Yeli Song},
journal= {arXiv preprint arXiv:0802.2170},
year = {2015}
}
Comments
12 pages,1 figure, 1 table, 21 references; UN/ESA/NASA Workshop on Basic Space Science and the International Heliophysical Year 2007, National Astronomical Observatory of Japan, 18-22 June, 2007, Tokyo, Japan