Characterizing the propagation of gravity waves in 3D nonlinear simulations of solar-like stars
Characterizing the propagation of gravity waves in 3D nonlinear simulations of solar-like stars
复制标题
在类太阳恒星 3D 非线性模拟中表征重力波的传播
DOI：
10.1051/0004-6361/201526250
复制
发表时间：
2015
期刊：
影响因子：
--
通讯作者：
Rafael A. García
中科院分区：
文献类型：
--
作者：
L. Alvan;A. Strugarek;A. Strugarek;A. Brun;Stéphane Mathis;Rafael A. García
日震学和星震学的革命通过研究星星的振荡模式提供了对恒星内部详细性质的了解。其中，重力（g）模是由在恒星辐射带中传播的重力内行波（IGW）之间的相长干涉形成的。我们对类太阳星星内部的新的3D非线性模拟使我们能够研究这些波的激发、传播和耗散。这篇文章的目的是澄清我们对IGW在3D辐射区域中的行为的理解，并提供其属性的清晰概述。我们使用的频率滤波的方法，揭示了不同频率的重力波在辐射区的路径。我们能够识别二维和三维中不同波的传播区域，将其与线性射线追踪理论进行比较，并区分传播波和驻波（g模式）。我们还表明，波所携带的能量分布在不同的平面中的球，这取决于他们的方位波数。我们能够从复杂的频谱中分离出单个IGW，并研究它们在空间和时间中的传播。特别是，我们强调在本文中的必要性，研究波在三维球面几何形状的传播，因为它们的能量分布是不均匀的领域。
The revolution of helio- and asteroseismology provides access to the detailed properties of stellar interiors by studying the star's oscillation modes. Among them, gravity (g) modes are formed by constructive interferences between progressive internal gravity waves (IGWs), propagating in stellar radiative zones. Our new 3D nonlinear simulations of the interior of a solar-like star allows us to study the excitation, propagation, and dissipation of these waves. The aim of this article is to clarify our understanding of the behavior of IGWs in a 3D radiative zone and to provide a clear overview of their properties. We use a method of frequency filtering that reveals the path of {individual} gravity waves of different frequencies in the radiative zone. We are able to identify the region of propagation of different waves in 2D and 3D, to compare them to the linear raytracing theory and to distinguish between propagative and standing waves (g modes). We also show that the energy carried by waves is distributed in different planes in the sphere, depending on their azimuthal wave number. We are able to isolate individual IGWs from a complex spectrum and to study their propagation in space and time. In particular, we highlight in this paper the necessity of studying the propagation of waves in 3D spherical geometry, since the distribution of their energy is not equipartitioned in the sphere.
太阳型恒星中心附近的内波破碎和潮汐耗散
DOI：
10.1111/j.1365-2966.2010.16400.x
发表时间：
2010
影响因子：
4.8
作者：
Barker A
通讯作者：
Barker A