Solar p modes of high degree l: coupling by differential rotation

Solar p modes of high degree l: coupling by differential rotation
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高次 l 的太阳 p 模式:通过差动旋转耦合

DOI:
10.1111/j.1365-2966.2007.11894.x
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发表时间:
2007
影响因子:
4.8
通讯作者:
Vorontsov S
Vorontsov S
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Vorontsov S

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精确测量太阳p模频率和高角度的频率分裂需要对模式耦合效应有足够的理论认识,模式耦合效应是由太阳内自转角速度随纬度的变化引起的。复合解的展开系数(耦合系数)的早期结果是由于Woodard。在本文中,分析扩展到允许的深度上的差分旋转的依赖性,和结果表示在可测量的量(旋转分裂系数),这使得它便于诊断的目的。分析是基于准简并微扰理论的方法,并进一步扩展到解决模式耦合的观测线轮廓的可能影响。它示出,使用近似适用于在高的degreel,在观测功率谱中的复合模式的预期线轮廓不失真的模式耦合。
Accurate measurements of solar p-mode frequencies and frequency splittings at high degreelrequire an adequate theoretical knowledge of the effects of mode coupling, induced by the variation with latitude of the angular velocity of the solar internal rotation. Earlier results for expansion coefficients of composite solutions (coupling coefficients) are due to Woodard. In this paper, the analysis is extended to allow for the dependence of the differential rotation on depth, and the result is expressed in terms of measurable quantities (the rotational splitting coefficients), which makes it convenient for diagnostic purposes. The analysis is based on the approach of quasi-degenerate perturbation theory, and is extended further to address possible effects of mode coupling in the observational line profiles. It is shown, using approximations applicable at high degreel, that the expected line profiles of composite modes in the observational power spectra are not distorted by mode coupling.
纬度差分旋转对高阶太阳 p 模式本征函数的畸变
DOI: --
发表时间: 1989
期刊:
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作者:
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