论文标题
低质量AGN的可变性：振荡或喷发？
Variability In A Low-Mass AGN: Oscillation Or Eruption?
论文作者
论文摘要
在发现四个星系中看到的新的X射线变异性（称为准周期性喷发（QPE））之后，我们重新考虑了低质量AGN 2XMM J123103.2+110648中看到的可变性，以确定是否应被认为是第五QPE QPE主机Galaxy。我们将自相关功能应用于两个档案XMM-Newton观测值，以确定$ \ sim $ 13.52 ks和$ \ sim $ 14.35 ks的变异性的特征时间表。在这些时间尺度上折叠并展开的Lightcurves的建模表明，高斯模型比正弦模型更可取，平均持续时间为6.17 Ks和7.69 Ks。在宽的0.2-1.0 keV频段中，发现明亮相位的平均幅度是静态计数速率的2.86和8.56倍。在2xmm J123103.2+110648中看到的可变性模式不能被确定为一系列准周期性喷发。取而代之的是，这表明可能有一个准周期性变异性，从爆发到由单个机制引起的振荡。这提供了寻找进一步来源的可能性，这些资源继续弥合QPE和准周期振荡之间的差距。对其他11个其他低质量AGN $（log（m_ {bh}）\ Lessim 6）的47个观察结果的有针对性分析在其他类似的质量对象的样本中没有发现QPE或QPO样行为的证据。
Following the discovery of a new class of X-ray variability seen in four galaxies, dubbed Quasi-Periodic Eruptions (QPEs), we reconsider the variability seen in the low-mass AGN 2XMM J123103.2+110648 to ascertain whether it should be considered the fifth QPE host galaxy. We apply the autocorrelation function to two archival XMM-Newton observations to determine characteristic timescales for variability of $\sim$ 13.52 ks and $\sim$ 14.35 ks. The modelling of lightcurves, both folded at these timescales and unfolded, indicates that a Gaussian model is preferable over a sinusoidal model, with average durations for the bright phases of 6.17 ks and 7.69 ks. In a broad 0.2-1.0 keV band the average amplitude of the bright phases was found to be 2.86 and 8.56 times the quiescent count rate. The pattern of variability seen in 2XMM J123103.2+110648 cannot be definitively declared as a series of Quasi-Periodic Eruptions. Instead, this suggests there may be a continuum of quasi-periodic variability ranging from eruptions to oscillations being caused by a single mechanism. This offers the possibility of finding further sources that continue to bridge the gap between QPEs and Quasi-Periodic Oscillations. A targeted analysis of 47 observations of 11 other low-mass AGN $(log(M_{BH}) \lesssim 6)$ found no evidence of QPE or QPO-like behaviour in a sample of other similar mass objects.
