标题： 中等极 - 截断吸积盘的灾变性变星的非周期光学变化 显示英文标题

标题： Aperiodic optical variability of intermediate polars - cataclysmic variables with truncated accretion disks

摘要： 我们研究了七个包含磁化非同步吸积白矮星的中等极性天体在光学波段的变异性功率谱，这些天体包括XSS J00564+4548, IGR J00234+6141, DO Dra, V1223 Sgr, IGR J15094-6649, IGR J16500-3307和IGR J17195-4100，并证明其变异性可以由基于截断吸积盘中波动传播的模型很好地描述。 功率谱在傅里叶频率处有断点，我们将这些断点与白矮星磁层边界处的开普勒频率相关联。 我们提出，光学功率谱的特性可用于推断吸积盘内部结构的几何形态，特别是：1）中等极性天体中磁扰动吸积盘的截断半径，2）矮新星平静状态下的吸积盘截断半径。 显示英文摘要

摘要： We study the power spectra of the variability of seven intermediate polars containing magnetized asynchronous accreting white dwarfs, XSS J00564+4548,IGR J00234+6141, DO Dra, V1223 Sgr, IGR J15094-6649, IGR J16500-3307 and IGR J17195-4100, in the optical band and demonstrate that their variability can be well described by a model based on fluctuations propagating in a truncated accretion disk. The power spectra have breaks at Fourier frequencies, which we associate with the Keplerian frequency of the disk at the boundary of the white dwarfs' magnetospheres. We propose that the properties of the optical power spectra can be used to deduce the geometry of the inner parts of the accretion disk, in particular: 1) truncation radii of the magnetically disrupted accretion disks in intermediate polars, 2) the truncation radii of the accretion disk in quiescent states of dwarf novae