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초강력 레이저 과학 연구단
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Propagation and damping of Alfvén waves in low solar atmosphere

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Title
Propagation and damping of Alfvén waves in low solar atmosphere
Author(s)
Chang-Mo Ryu; Cong Tuan Huynh
Publication Date
2017-10
Journal
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, v.471, no.2, pp.2237 - 2241
Publisher
OXFORD UNIV PRESS
Abstract
Propagation and damping of Alfvén waves in the inner solar corona are studied using a 2D magnetohydrodynamics (MHD) simulation code with realistic density and temperature profiles in a uniform background magnetic field. A linear wave is launched by ascribing a sinusoidal fluid motion at about 1000 km from the surface of the Sun, which is shown to generate Alfvénic wave motions along the height. The 2D MHD simulation shows that for B0 ≈ 3G, Alfvén waves of about 10-2 Hz with an infinite horizontal length-scale can penetrate into the corona, transferring about 90 per cent their energies. This raises the possibility that the wave can be dissipated by various physical processes. The results show that the propagating wave can effectively damp via viscosity in the lower region of the corona, if a horizontal scale of granular size is incorporated. © 2017 The Authors
URI
http://pr.ibs.re.kr/handle/8788114/5308
ISSN
0035-8711
Appears in Collections:
Center for Relativistic Laser Science(초강력 레이저과학 연구단) > Journal Papers (저널논문)
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