AGN SED拟合的新希望：基于C2PO-Torus模型的12MGS AGN X射线光谱分析
A New Hope for AGN SED Fitting: X-Ray Spectral Analysis of 12MGS AGN with the C2PO-Torus Model
- University of Cape Town（开普敦大学）
- Inter-University Institute for Data Intensive Astronomy, University of Cape Town（开普敦大学数据密集型天文学跨大学研究所）
- INAF–Istituto di Radioastronomia（意大利国家天体物理研究所射电天文研究所）
- INAF–Osservatorio di Astrofisica e Scienza dello Spazio (OAS)（意大利国家天体物理研究所天文与空间科学观测站）
- Dipartimento di Fisica e Astronomia (DIFA) Augusto Righi, Università di Bologna（博洛尼亚大学物理与天文学系）
机构由 AI 辅助整理，请以论文原文为准。
AI总结：
本文提出基于两相团块环面几何的C2PO-Torus X射线光谱模型，分析43个中红外选择的AGN，改进SED拟合，并发现低光度下的红外和射电过剩源于恒星形成污染。
AI中文摘要：
在本文中，我们展示了对43个中红外（IR）选择的恒星形成活动星系核（AGN）子样本进行的全面宽带X射线光谱分析结果。我们分析了档案中的NuSTAR、Chandra和XMM-Newton数据，并首次呈现了IRASF03450+0055的指向性X射线观测。我们引入了一个新的基于物理的X射线光谱模型C2PO-Torus，该模型基于两相团块环面几何结构，旨在提供环面的物理参数约束，这些参数可直接与AGN模型SKIRTOR的参数相关联。该模型将使我们能够利用X射线和红外波段之间的协同作用，对环面性质施加更强的约束，并通过为SKIRTOR参数提供先验来改进光谱能量分布（SED）拟合。我们将C2PO-Torus拟合的结果与传统模型获得的结果进行比较，发现它是拟合各种X射线光谱的极其有效的工具。我们观察到，我们的样本紧密遵循已建立的L_[OIII] - L_X AGN关系，而在低光度下，相对于L_X - L_12micron和L_X - L_1.4GHz AGN关系，呈现出红外和射电过剩。我们认为这种过剩是由于恒星形成相关发射的污染所致。我们预期C2PO-Torus模型将极大地帮助完成该样本的全光谱SED拟合，使我们能够正确解开这些天体的不同发射成分，这些天体是宇宙正午时期AGN的本地类似物。
英文摘要：
In this paper, we present the results of comprehensive, broadband X-ray spectral analysis of a subsample of 43 mid-Infrared (IR) selected star-forming active galactic nuclei (AGN). We analysed archival NuSTAR, Chandra, and XMM-Newton data, and present the first pointed X-ray observation of IRASF03450+0055. We introduce a new physically-based X-ray spectral model, C2PO-Torus, based on a two-phase clumpy torus geometry. It is designed to provide constraints on physical parameters of the torus that can be directly linked to the parameters of the AGN model SKIRTOR. This model will allow us to exploit the synergies between the X-ray and IR regimes, place stronger constraints on the torus properties, and improve spectral energy distribution (SED) fitting by providing priors for the SKIRTOR parameters. We compare the results from the C2PO-Torus fitting to those obtained from traditional models, finding that it is an extremely effective tool for fitting a wide variety of X-ray spectra. We observe that our sample closely follows the established L_[OIII] - L_X AGN relation, while presenting an IR and Radio excess with respect to the L_X - L_12micron and L_X - L_1.4GHz AGN relations at low luminosities. We believe that this excess is due to contamination from star formation related emission. We anticipate that the C2PO-Torus model will aid substantially in completing full-spectrum SED fitting of this sample, allowing us to properly disentangle the different emission components of these objects, which are local analogues of AGN at Cosmic Noon.
