The Origin of The Soft X-Ray Excess in the Seyfert 1.5 Galaxy ESO 362-G18  

作　　者：Xiao-Gu Zhong Jian-Cheng Wang 

机构地区：[1]Yunnan Observatories,Chinese Academy of Sciences,Kunming 650216,China [2]Key Laboratory for the Structure and Evolution of Celestial Objects,Chinese Academy of Sciences,Kunming 650216,China [3]University of Chinese Academy of Sciences,Beijing 100049,China

出　　处：《Research in Astronomy and Astrophysics》2022年第3期10-32,共23页天文和天体物理学研究（英文版）

基　　金：financial supports from the National Natural Science Foundation of China(Grant Nos.11133006 and 11173054);the National Basic Research Program of China(973 Program 2009CB824800);the Policy Research Program of Chinese Academy of Sciences(KJCX2-YW-T24)。

摘　　要：We review the Seyfert 1.5 Galaxy ESO 362-G18 for exploring the origin of the soft X-ray excess.The Warm Corona and Relativistic Reflection models are two main scenarios to interpret the soft X-ray excess in active galactic nuclei at present.We use the simultaneous X-ray observation data of XMM-Newton and Nu STAR on2016 September 24 to perform spectral analysis in two steps.First,we analyze the time-average spectra by using Warm Corona and Relativistic Reflection models.Moreover,we also explore the Hybrid model,Double Reflection model and Double Warm Corona model.We find that both the Warm Corona and Relativistic Reflection models can interpret the time-average spectra well but cannot be distinguished easily based on the time-averaged spectra fit statistics.Second,we add the rms and covariance spectra to perform the spectral analysis with time-average spectra.The result shows that the warm corona could reproduce all of these spectra well.The hot,optical thin corona and neutral distant reflection will increase their contribution with the temporal frequency,meaning that the corona responsible for X-ray continuum comes from the inner compact X-ray region and the neutral distant reflection is made of some moderate scale neutral clumps.

关 键 词：galaxies:active galaxies:individual(ESO 362-G18) galaxies:Seyfert 

分 类 号：P172.2[天文地球—天文学]