Measuring the Obscuring Column of a Disk Megamaser AGN in a Nearby Merger
Measuring the Obscuring Column of a Disk Megamaser AGN in a Nearby Merger
复制标题
DOI：
10.3847/1538-4357/ab3214
复制
发表时间：
2019-07
期刊：
影响因子：
--
通讯作者：
A. Masini;A. Comastri;R. Hickox;M. Koss;F. Civano;M. Brightman;M. Brusa;G. Lanzuisi
中科院分区：
文献类型：
--
作者：
A. Masini;A. Comastri;R. Hickox;M. Koss;F. Civano;M. Brightman;M. Brusa;G. Lanzuisi
众所周知，拥有盘状水巨源的活动星系核（agn）被大量气体所掩盖，这可能是由于在围绕超大质量黑洞运行的几乎是边缘的盘状结构的视线附近存在。校正高遮挡对于推断光源的固有参数（如亮度）至关重要。我们结合钱德拉和核之星的数据，对早期合并（NGC 5765B）中的水巨激光AGN进行了宽带x射线光谱分析。NGC 5765B是高度康普顿厚的，以反射为主，遵循了盘状巨透镜的一般趋势。结合来自脉泽的精细黑洞质量和我们的x射线光谱，估计超激光的Eddington比率在2%-14%的范围内，并通过SED拟合证实了其稳健性。
Active galactic nuclei (AGNs) hosting disk water megamasers are well known to be obscured by large amounts of gas, likely due to the presence along the line of sight of an almost edge-on disky structure orbiting the supermassive black hole. Correcting for the high obscuration is crucial to infer parameters intrinsic to the source, like its luminosity. We present a broadband X-ray spectral analysis of a water megamaser AGN in an early merger (NGC 5765B), combining Chandra and NuSTAR data. NGC 5765B is highly Compton-thick and reflection-dominated, following the general trend among disk megamasers. Combining the exquisite black hole mass from masers with our X-ray spectroscopy, the Eddington ratio of the megamaser is estimated to be in the 2%–14% range, and its robustness is confirmed through SED fitting.