论文标题
Nustar时代的康普顿 - 厚AGN。 ix。四个本地AGN的联合Nustar和XMM-Newton分析
Compton-thick AGN in the NuSTAR Era. IX. A Joint NuSTAR and XMM-Newton Analysis of Four Local AGN
论文作者
论文摘要
我们介绍了附近的四个厚实的活跃银河核（AGN）候选者的宽带X射线光谱分析的结果，该频谱分析是从Swift-Burst Alert望远镜（BAT）150个月目录中选择的。这项工作是识别和表征所有Compton-Thick（NH> = 10^24 cm^-2）AGN的更大努力的一部分（z <0.05）。我们使用了三种出色动机的模型-Mytorus，Borus02和Uxclumpy-来适合和表征这些来源。 Of the four candidates analyzed, 2MASX J02051994-0233055 was found to be an unobscured (NH < 10^22 cm^-2) AGN, 2MASX J04075215-6116126 and IC 2227 to be Compton-thin (10^22 cm^-2 < NH < 10^24 cm^-2) AGN, and one, ESO 362-8被确认为康普顿厚的AGN。此外，发现每个来源在其视线线和平均氢柱密度之间都具有统计学上的显着差异，进一步支持了这样一种观念，即AGN中遮盖的材料不均匀。此外，我们的样品中的一半（2MasX J02051994-0233055和2Masx J04075215-6116126）在过去十年中表现出显着的亮度变化，这表明这可能是AGN的常见特征。
We present the results of the broadband X-ray spectral analysis of simultaneous NuSTAR and XMM-Newton observations of four nearby Compton-thick active galactic nuclei (AGN) candidates selected from the Swift-Burst Alert Telescope (BAT) 150-month catalog. This work is part of a larger effort to identify and characterize all Compton-thick (NH >= 10^24 cm^-2) AGN in the local Universe (z < 0.05). We used three physically motivated models -- MYTorus, borus02, and UXClumpy -- to fit and characterize these sources. Of the four candidates analyzed, 2MASX J02051994-0233055 was found to be an unobscured (NH < 10^22 cm^-2) AGN, 2MASX J04075215-6116126 and IC 2227 to be Compton-thin (10^22 cm^-2 < NH < 10^24 cm^-2) AGN, and one, ESO 362-8, was confirmed to be a Compton-thick AGN. Additionally, every source was found to have a statistically significant difference between their line-of-sight and average torus hydrogen column density, further supporting the idea that the obscuring material in AGN is inhomogeneous. Furthermore, half of the sources in our sample (2MASX J02051994-0233055 and 2MASX J04075215-6116126) exhibited significant luminosity variation in the last decade, suggesting that this might be a common feature of AGN.
