论文标题
通过Astrosat观测来揭示Maxi J1820+070的时间特性
Unveiling the temporal properties of MAXI J1820+070 through AstroSat observations
论文作者
论文摘要
我们在这里介绍了新检测到的黑洞二进制二进制Maxi J1820+070的第一个宽带同时频谱和时间研究的结果，如SXT和LAXPC在板载Astrosat所见。使用磁盘黑体分配和A Reflection和A Reflection and Reflectorment和Reflectorment和A disk Black-boty Componsement良好的能量范围内观察到的组合光谱。频谱分析表明，源处于其硬光谱状态（伽马= 1.61），带有凉爽的磁盘（ktin = 0.22 keV）。我们使用LAXPC数据报告了能量范围3-80 keV的不同频率下的能量依赖性时间平方平方（RMS）变异性。我们还使用单个区域随机传播模型对通量变异性进行了建模，以量化时间差和分数RMS变异性的观察到的能量依赖性，然后将结果与Cygnus X-1的结果进行了比较。此外，我们在47.7 MHz时确认了以质心频率检测出的准周期性振荡。
We present here the results of the first broadband simultaneous spectral and temporal studies of the newly detected black hole binary MAXI J1820+070 as seen by SXT and LAXPC on-board AstroSat.The observed combined spectra in the energy range 0.7-80 keV were well modeled using disk black-body emission, thermal Comptonization and a reflection component. The spectral analysis revealed that the source was in its hard spectral state (Gamma=1.61) with a cool disk (kTin=0.22 keV). We report the energy dependent time-lag and root mean squared (rms) variability at different frequencies in the energy range 3-80 keV using LAXPC data. We also modeled the flux variability using a single zone stochastic propagation model to quantify the observed energy dependence of time-lag and fractional rms variability and then compared the results with that of Cygnus X-1. Additionally, we confirm the detection of a quasi-periodic oscillation with the centroid frequency at 47.7 mHz.
