Studying accreting black holes and neutron stars with time series: beyond the power spectrum
Studying accreting black holes and neutron stars with time series: beyond the power spectrum
复制标题
用时间序列研究吸积黑洞和中子星：超越功率谱
DOI：
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发表时间：
2007
期刊：
影响因子：
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通讯作者：
P. Uttley
中科院分区：
文献类型：
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作者：
S. Vaughan;P. Uttley
宇宙X射线源的亮度波动，特别是吸积黑洞和中子星系统，使得人们在理解湍流吸积流物理、中子星表面物质行为以及改善黑洞证据方面取得了巨大进展。这些进展大部分是通过对时间序列数据的功效和交叉谱进行分析和建模而取得的，正如本卷其他文章中将讨论的那样。最近，人们尝试通过测试非线性、非高斯性、时间不对称性以及检查高阶傅里叶谱来利用数据的其他方面。这些项目是由于过去十年中数据质量和数量的大幅提高而成为可能的，也是本文的主题。
The fluctuating brightness of cosmic X-ray sources, particularly accreting black holes and neutron star systems, has enabled enormous progress in understanding the physics of turbulent accretion flows, the behaviour of matter on the surfaces of neutron stars and improving the evidence for black holes. Most of this progress has been made by analysing and modelling time series data in terms of their power and cross spectra, as will be discussed in other articles in this volume. Recently, attempts have been made to make use of other aspects of the data, by testing for non-linearity, non-Gaussianity, time asymmetry and by examination of higher order Fourier spectra. These projects, which have been made possible by the vast increase in data quality and quantity over the past decade, are the subject of this article.