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.2,4; Fei, Z. Y.2,4; Zhang GB(张国宝)1,3; Yang, X. J.2,4 |
| 刊名 | Astronomy and Astrophysics
 |
| 出版日期 | 2024-09-01 |
| 卷号 | 689 |
| ISSN号 | 0004-6361 |
| DOI | 10.1051/0004-6361/202348783 |
| 产权排序 | 第3完成单位 |
| 文献子类 | Journal article (JA) - |
| 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). © The Authors 2024. |
| 学科主题 | 天文学 ; 天体物理学 ; 高能天体物理学 ; 星系与宇宙学 |
| URL标识 | 查看原文 |
| 资助项目 | N/A |
| 语种 | 英语 |
| 资助机构 | N/A |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/28809]  |
| 专题 | 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.Yunnan Observatories, Chinese Academy of Sciences (CAS), Kunming, 650216, China; 2.Department of Physics, Xiangtan University, Hunan, Xiangtan, 411105, China; 3.Key Laboratory for the Structure and Evolution of Celestial Objects, CAS, Kunming, 650216, China 4.Key Laboratory of Stars and Interstellar Medium, Xiangtan University, Hunan, Xiangtan, 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 and 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 and Astrophysics,689. |
| MLA | Lyu, M.,et al."Investigation into the origin of the soft excess in Ark 564 using principal component analysis".Astronomy and Astrophysics 689(2024). |
入库方式： OAI收割
来源：云南天文台
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