论文标题
重力波动术和高分辨率光谱法揭示的大量恒星内饰
Massive star interiors revealed by gravity wave asteroseismology and high-resolution spectroscopy
论文作者
论文摘要
近年来，已经发现，大型恒星通常在其光曲线中表现出一种非连接形式的可变性形式，称为随机低频（SLF）变异性。各种物理机制可以在此类恒星中产生SLF的可变性，包括在对流和辐射区域的界面上激发的随机重力波，在近表面层中产生的动态湍流以及块状风。特别是重力波是解释SLF变异性的有前途的候选者，因为由于存在对流核的存在，它们可能会在主序列中生成普遍存在，并且因为它们提供了大规模的主要切向速度场，以解释光谱线拟合中的大型扰动。在这里，我概述了从时间序列光度法和光谱法研究大量恒星中SLF变异性的方法和结果。
In recent years, it has been discovered that massive stars commonly exhibit a non-coherent form of variability in their light curves referred to as stochastic low frequency (SLF) variability. Various physical mechanisms can produce SLF variability in such stars, including stochastic gravity waves excited at the interface of convective and radiative regions, dynamic turbulence generated in the near-surface layers, and clumpy winds. Gravity waves in particular are a promising candidate for explaining SLF variability as they can be ubiquitously generated in main sequence stars owing to the presence of a convective core, and because they provide the large-scale predominantly tangential velocity field required to explain macroturbulence in spectral line fitting. Here, I provide an overview of the methods and results of studying SLF variability in massive stars from time series photometry and spectroscopy.
