Spectral Fittings of Warm Coronal Radiation with High Seed Photon Temperature:Apparent Low-temperature and Flat Soft Excess in AGNs

作     者：Ze-Yuan Tang Jun-Jie Feng Jun-Hui Fan Ze-Yuan Tang;Jun-Jie Feng;Jun-Hui Fan

作者机构：School of Mathematics and Information ScienceGuangzhou UniversityGuangzhou 510006China Center for AstrophysicsGuangzhou UniversityGuangzhou 510006China Astronomy Science and Technology Research Laboratory of Department of Education of Guangdong ProvinceGuangzhou 510006China Key Laboratory for Astronomical Observation and Technology of GuangzhouGuangzhou 510006China 

出 版 物：《Research in Astronomy and Astrophysics》 (天文和天体物理学研究（英文版）)

年 卷 期：2024年第24卷第7期

页      面：135-144页

核心收录：

学科分类：07[理学] 070401[理学-天体物理] 0704[理学-天文学] 

基　　金：partially supported by the National Natural Science Foundation of China(NSFC,grant Nos.U2031201 and11733001) the Natural Science Foundation of Guangdong Province(2019B030302001) the science research grants from the China Manned Space Project,with No.CMS-CSST-2021-A06 support from Astrophysics Key Subjects of Guangdong Province and Guangzhou City support from Scientific and Technological Cooperation Projects(2020-2023)between the People’s Republic of China and the Republic of Bulgaria support that was received from Guangzhou University(No.YM2020001) 

主　　题：galaxies active-accretion-accretion disks-black hole physics 

摘      要：A warm corona has been widely proposed to explain the soft excess(SE)in X-ray above the 2-10 ke V power law extrapolation in Active Galactic Nuclei(AGNs).In actual spectral fittings,the warm coronal seed photon temperature(T_s)is usually assumed to be far away from the soft X-ray,but kT_scan reach close to 0.1 ke V in the standard accretion disk *** this study,we used Monte Carlo simulations to obtain radiation spectra from a slab-like warm corona and fitted the spectra using the spherical-geometry-based routine THCOMP or a thermal *** findings reveal tha high T_scan influence the fitting results.A moderately high kT_s(around 0.03 ke V)can result in an apparent low-temperature and flat SE,while an extremely high kT_s(around 0.07 ke V)can even produce an unobserved blackbody-like *** conclusions indicate that,for spectral fittings of the warm coronal radiation(SE in AGNs),kT_sshould be treated as a free parameter with an upper limit,and an accurate coronal geometry is necessary when kT_s0.01 ke V.