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Investigation into the origin of the soft excess in Ark 564 using principal component analysis

文献类型：期刊论文

作者Lyu, M.3,4; Fei, Z. Y.3,4; Zhang GB(张国宝)1,2; Yang, X. J.3,4
刊名ASTRONOMY & ASTROPHYSICS
出版日期2024-09-06
卷号689
关键词Galaxy: nucleus galaxies: Seyfert
ISSN号0004-6361
DOI10.1051/0004-6361/202348783
产权排序第3完成单位
文献子类Article
英文摘要We combined a principal component analysis (PCA) and spectroscopy to investigate the origin of the soft excess in narrow-line Seyfert 1 galaxy Ark 564 with XMM-Newton observations over a period of ten years. We find that the principal components in different epochs are very similar, suggesting stable variability patterns in this source. More importantly, although its spectra could be equally well fitted by the two soft excess models, simulations show that the principal components from the relativistically smeared reflection model match the data well. At the same time, the principal components from the warm corona model show significant inconsistency. This finding indicates that the soft excess in Ark 564 originates from the relativistically smeared reflection, rather than the Comptonization in the warm corona, thereby favoring the reflection origin or the hybrid origin of the soft excess. Furthermore, the presence of the narrow absorption features in the spectra suggests that the soft excess is unlikely to originate from absorptions due to possible outflowing winds. Our results indicate that the PCA coupled with spectral analysis is a promising approach to exploring the origin of the soft excess in active galactic nuclei (AGNs).
学科主题天文学 ; 星系与宇宙学
URL标识查看原文
出版地17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE
WOS关键词X-RAY EXCESS ; ACTIVE GALACTIC NUCLEI ; NARROW-LINE ; XMM-NEWTON ; SPECTRAL VARIABILITY ; IONIZED REFLECTION ; NGC 4151 ; SEYFERT-1 ; EMISSION ; WARM
资助项目Hunan Education Department Foundation[21A0096]; National Natural Science Foundation of China[NSFC 12122302]; National Natural Science Foundation of China[12333005]; Postgraduate Scientific Research Innovation Project of Hunan Province[CX20220662]; Postgraduate Scientific Research Innovation Project of Xiangtan University[XDCX2022Y072]
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:001308055500022
出版者EDP SCIENCES S A
资助机构Hunan Education Department Foundation[21A0096] ; National Natural Science Foundation of China[NSFC 12122302, 12333005] ; Postgraduate Scientific Research Innovation Project of Hunan Province[CX20220662] ; Postgraduate Scientific Research Innovation Project of Xiangtan University[XDCX2022Y072]
版本出版稿
源URL[http://ir.ynao.ac.cn/handle/114a53/27653]  
专题云南天文台_高能天体物理研究组
云南天文台_中国科学院天体结构与演化重点实验室
作者单位1.Key Laboratory for the Structure and Evolution of Celestial Objects, CAS, Kunming 650216, P.R. China
2.Yunnan Observatories, Chinese Academy of Sciences (CAS), Kunming 650216, P.R. China;
3.Key Laboratory of Stars and Interstellar Medium, Xiangtan University, Xiangtan, Hunan 411105, China;
4.Department of Physics, Xiangtan University, Xiangtan, Hunan 411105, China;
推荐引用方式
GB/T 7714		 Lyu, M.,Fei, Z. Y.,Zhang GB,et al. Investigation into the origin of the soft excess in Ark 564 using principal component analysis[J]. ASTRONOMY & ASTROPHYSICS,2024,689.
APA Lyu, M.,Fei, Z. Y.,张国宝,&Yang, X. J..(2024).Investigation into the origin of the soft excess in Ark 564 using principal component analysis.ASTRONOMY & ASTROPHYSICS,689.
MLA Lyu, M.,et al."Investigation into the origin of the soft excess in Ark 564 using principal component analysis".ASTRONOMY & ASTROPHYSICS 689(2024).

入库方式： OAI收割

来源：云南天文台

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