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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
ISSN0035-8711
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.
文章类型Article
关键词Convection Sun: Oscillations
WOS标题词Science & Technology ; Physical Sciences
学科领域Astronomy & Astrophysics
DOI10.1111/j.1365-2966.2010.16662.x
关键词[WOS]AMPLITUDE RED VARIABLES ; SOLAR P-MODES ; GRAVITATIONAL LENSING EXPERIMENT ; TIME-DEPENDENT CONVECTION ; EQUATION-OF-STATE ; PULSATIONAL STABILITY ; TURBULENT CONVECTION ; INTRINSIC VARIABLES ; STOCHASTIC EXCITATION ; STELLAR ENVELOPES
收录类别SCI
语种英语
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
WOS记录号WOS:000279450900050
引用统计
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://libir.pmo.ac.cn/handle/332002/11214
专题院士文集_熊大闰
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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