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题名: NONLINEAR DAMPING OF ALFVEN WAVES IN THE SOLAR CORONA BELOW 1.5 SOLAR RADII
作者: Zhao, J. S.1, 2; Voitenko, Y.3; Guo, Y.4, 5; Su, J. T.2; Wu, D. J.1
刊名: ASTROPHYSICAL JOURNAL
出版日期: 2015-10-01
卷号: 811, 期号:2
关键词: magnetohydrodynamics (MHD) ; solar wind ; Sun: corona ; waves
DOI: 10.1088/0004-637X/811/2/88
文章类型: Article
英文摘要: Nonthermal velocities measured in the solar corona imply a strong damping of upward-propagating low-frequency less than or similar to 0.01 Hz Alfven waves at heliocentric distances from 1.02 to 1.4 solar radii. We propose a vector Alfven wave decay as a feasible mechanism for the observed Alfven wave damping. Contrary to the extensively studied scalar decay, the vector decay does not depend on the wave frequency and can be efficient for low-frequency coronal Alfven waves. We show that the vector decay is much stronger than the scalar decay and can provide the observed damping of 0.01 Hz coronal Alfven waves with perpendicular wavelengths of similar to 10(4) km or less. Fully three-dimensional (3D) numerical simulations are needed to capture this decay, whose growth rate is proportional to the vector product of interacting wave vectors.
WOS标题词: Science & Technology ; Physical Sciences
类目[WOS]: Astronomy & Astrophysics
研究领域[WOS]: Astronomy & Astrophysics
关键词[WOS]: MAGNETOHYDRODYNAMIC TURBULENCE ; WIND ACCELERATION ; LINE WIDTHS ; ENERGY ; HOLES ; PROPAGATION ; PHOTOSPHERE ; SIMULATION ; GENERATION ; FIELDS
收录类别: SCI
项目资助者: Belgian Federal Science Policy Office via the Solar-Terrestrial Centre of Excellence IAP Programme(P7/08 CHARM) ; European Commission(313038 STORM) ; NSFC(11203014 ; MSTC(2011CB811402) ; NSF of Jiangsu Province(BK2012495) ; Key Laboratory of Solar Activity at NAO, CAS(KLSA201501) ; Youth Innovation Promotion Association CAS ; 11303099 ; 11373070 ; 41074107 ; 41531071)
语种: 英语
WOS记录号: WOS:000363513800016
Citation statistics:
内容类型: 期刊论文
URI标识: http://libir.pmo.ac.cn/handle/332002/16029
Appears in Collections:太阳和太阳系等离子体研究团组_期刊论文

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作者单位: 1.Chinese Acad Sci, Key Lab Planetary Sci, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China
2.Chinese Acad Sci, Key Lab Solar Act, Natl Astron Observ, Beijing 100012, Peoples R China
3.Belgian Inst Space Aeron, Space Phys Div, Solar Terr Ctr Excellence, B-1180 Brussels, Belgium
4.Nanjing Univ, Sch Astron & Space Sci, Nanjing 210046, Jiangsu, Peoples R China
5.Nanjing Univ, Key Lab Modern Astron & Astrophys, Minist Educ, Nanjing 210046, Jiangsu, Peoples R China
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