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Non-adiabatic oscillations of the low- and intermediate-degree modes of the Sun
Xiong, D. R.1; Deng, L.2
2010-07-11
发表期刊MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷号405期号:4页码:2759-2767
摘要Using a non-local time-dependent theory of convection, the linear stability is analysed for low- and intermediate-degree (l = 1-25) g4-p39 modes of the Sun. The results show that all the p modes with periods from similar to 3 to similar to 16 min are pulsationally unstable, while all the g, f and p modes with periods longer than similar to 16 min and the high-frequency p modes with periods shorter than similar to 3 min are stable except the low-degree (l = 1-5) p1 modes. The pulsation amplitude growth rates depend on only the frequency and almost do not depend on l. They achieve the maximum at nu similar to 3700 mu Hz (P similar to 270 s). The effects of radiation and convection on the stability are analysed in detail. The coupling between convection and oscillations plays a key role for stabilization of low-frequency f and p modes and excitation of intermediate- and high-frequency p modes. We propose that the solar 5-min oscillations are not excited by a single mechanism, but are resulted from the combined effects of the 'regular' coupling between convection and oscillations and the turbulent stochastic excitation. The coupling between convection and oscillations is the dominant excitation and damping mechanism for the low- and intermediate-frequency modes, and the turbulent stochastic excitation is the main excitation mechanism for high-frequency p modes.
关键词Convection Sun: Oscillations
DOI10.1111/j.1365-2966.2010.16662.x
收录类别SCI
语种英语
WOS记录号WOS:000279450900050
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被引频次:4[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.bao.ac.cn/handle/114a11/7802
专题光学天文研究部
作者单位1.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China
2.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
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Xiong, D. R.,Deng, L.. Non-adiabatic oscillations of the low- and intermediate-degree modes of the Sun[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2010,405(4):2759-2767.
APA Xiong, D. R.,&Deng, L..(2010).Non-adiabatic oscillations of the low- and intermediate-degree modes of the Sun.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,405(4),2759-2767.
MLA Xiong, D. R.,et al."Non-adiabatic oscillations of the low- and intermediate-degree modes of the Sun".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 405.4(2010):2759-2767.
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