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A Self-consistent Numerical Study of the Global Solar Wind Driven by the Unified Nonlinear Alfven Wave
Yang, LP; Feng, XS; He, JS; Zhang, L; Zhang, M; Yang, LP (reprint author), Chinese Acad Sci, SIGMA Weather Grp, Natl Space Sci Ctr, State Key Lab Space Weather, Beijing 100190, Peoples R China.; Yang, LP (reprint author), Peking Univ, Sch Earth & Space Sci, Beijing 100871, Peoples R China.
Department空间科学部
Source PublicationSOLAR PHYSICS
2016
Volume291Issue:3Pages:953-963
ISSN0038-0938
Language英语
KeywordMagnetohydrodynamics Solar Wind Theory Waves Alfven
AbstractThe global solar wind has been revealed via in situ observations to consist of two populations, i.e. the tenuous fast solar wind and the dense slow solar wind. Here, we present a self-consistent modeling of the global solar wind driven by the unified nonlinear Alfv,n wave. Considering polytropic closure of magnetohydrodynamics instead of isothermal assumption, the low-frequency Alfv,n waves with a broadband spectrum are globally injected at the base of the corona, with the amplitude independent of latitude. In our 2.5 dimensional model, the presence of the Alfv,n waves is identified overall in a region away from the equatorial plane, and the waves significantly accelerate the plasma therein to form the fast wind. Near the equatorial plane, a slow wind is generated, and the slowness can be attributed to the absence of Alfv,n waves owing to the strong damping at lower altitude. The velocity ratio of both modes, if extrapolated to 1 AU, conforms to the measurements. Far from the Sun, however, the temperature of the fast wind is lower than that of its surroundings, indicating that shock-heating might be inadequate and other mechanisms are probably required to heat the fast wind, such as the dissipation of Alfv,nic turbulence.
Indexed BySCI
Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/5398
Collection空间科学部
Corresponding AuthorYang, LP (reprint author), Chinese Acad Sci, SIGMA Weather Grp, Natl Space Sci Ctr, State Key Lab Space Weather, Beijing 100190, Peoples R China.; Yang, LP (reprint author), Peking Univ, Sch Earth & Space Sci, Beijing 100871, Peoples R China.
Recommended Citation
GB/T 7714
Yang, LP,Feng, XS,He, JS,et al. A Self-consistent Numerical Study of the Global Solar Wind Driven by the Unified Nonlinear Alfven Wave[J]. SOLAR PHYSICS,2016,291(3):953-963.
APA Yang, LP.,Feng, XS.,He, JS.,Zhang, L.,Zhang, M.,...&Yang, LP .(2016).A Self-consistent Numerical Study of the Global Solar Wind Driven by the Unified Nonlinear Alfven Wave.SOLAR PHYSICS,291(3),953-963.
MLA Yang, LP,et al."A Self-consistent Numerical Study of the Global Solar Wind Driven by the Unified Nonlinear Alfven Wave".SOLAR PHYSICS 291.3(2016):953-963.
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