论文标题
MV Lyr中高和低状态之间闪烁的形态的交替
Alternation of the flickering morphology between the high and low state in MV Lyr
论文作者
论文摘要
AIMS：我们研究了从高州到低状态的过渡期间，类似Nova的系统MV Lyl的独特数据，反之亦然。我们对Scaringi等人先前发现的频率成分的演变感兴趣。在开普勒也获得的不同数据中。方法：我们将光曲线分为10天的段，并研究了相应的功率密度光谱。我们通过与Lorentzian函数拟合搜索单个频率组件。此外，我们使用从光曲线计算为10个同样空间的子样本的平均射击曲线研究了变异性。结果：我们发现功率密度光谱的变化非常复杂。我们将研究集中在三个频率成分上。在低频率下可以看到强大的活动增加。相反，频谱的高频部分强烈降低功率，而单个组件的特征频率的特异性上升。我们讨论了这种现象学的各种场景，因为在退缩的积聚盘或外盘上更活跃区域的辐射中的X射线重新处理。最后，我们表明各种灾难性变量在功率密度光谱中显示出相似的特征频率。这些取决于活动阶段，使情况类似于X射线二进制。
AIMS: We studied unique data of a nova-like system MV Lyr during transition from the high to low state and vice versa taken by the Kepler space telescope. We were interested in evolution of frequency components found previously by Scaringi et al. in different data also obtained by Kepler. METHODS: We divided the light curve into 10 day segments and investigated the corresponding power density spectra. We searched for individual frequency components by fitting with Lorentzian functions. Additionally, we investigated the variability using averaged shot profiles calculated from the light curve divided into 10 equally spaces subsamples. RESULTS: We found very complex changes of the power density spectra. We focused our study onto three frequency components. Strong activity increase is seen at low frequencies. Contrariwise, the high frequency part of the spectrum strongly decreases in power with specific rise in characteristic frequencies of the individual components. We discuss various scenarios of this phenomenology as reprocessing of X-rays in a receding accretion disc or a radiation from a more active region at the outer disc. Finally, we show that various cataclysmic variables show similar characteristic frequencies in their power density spectra. These are dependent on activity stage, making the situation similar to X-ray binaries.
