The process by which stars accumulate their mass is episodic, characterized by long-duration low-accretion phases punctuated with intense accretion bursts. The bursts are several orders of magnitude greater in accretion rate and contribute a significant fraction of the total mass. In this article we present results of performing a time series analysis using the Fourier transform on a computer simulation of the burst mode of mass accretion. We find that the most prominent peaks in the power spectrum correspond to characteristic timescales of several thousand years.

中文翻译：

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阶段性恒星质量吸积的功率谱

恒星积累质量的过程是偶发的，其特点是持续时间长的低吸积阶段不时出现强烈的吸积爆发。爆发的吸积率要高几个数量级，并且占总质量的很大一部分。在本文中，我们展示了使用傅里叶变换对质量吸积爆发模式的计算机模拟进行时间序列分析的结果。我们发现功率谱中最突出的峰值对应于几千年的特征时间尺度。