A statistical study of the relation between soft X-ray excess and accretion disk
文献类型：期刊论文
| 作者 | Liu JY(刘杰英)1,2,3 ; Qiao EL(乔二林)1,2
|
| 刊名 | SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
 |
| 出版日期 | 2010-01 |
| 卷号 | 53期号:Supplement 1页码:102-105 |
| 关键词 | accretion: accretion disks ultraviolet: galaxies X-rays: galaxies |
| ISSN号 | 1674-7348 |
| 产权排序 | 第一完成单位 |
| 通讯作者 | Liu, JY (reprint author), Chinese Acad Sci, Yunnan Observ, Natl Astron Observ, Kunming 650011, Peoples R China. |
| 英文摘要 | To study the origin of the soft X-ray excess, we compile a sample of 94 unobscured, radio-quiet QSOs and Seyfert galaxies with available data from GALEX and ROSAT. We find that 50 sources show strong soft X-ray excess and the other 44 show weak/no soft X-ray excess. Systematic analyses of the data indicate that the difference in soft X-rays is mainly but not only resulting from different accretion rates (in units of Eddington rate). The statistical study of the sources with soft X-ray excess shows that the strength of soft X-ray excess weakly and positively correlates with the Eddington ratio and increases with the increase of the strength of UV radiations relative to the X-rays. Provided that the UV emissions are from the thin disk, the correlations imply that the origin of soft X-ray excess is associated with the thin disk, either by means of Comptonization of the disk photons or in some other ways. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 学科主题 | Physics |
| 分类号 | P172.2 |
| 类目[WOS] | Physics, Multidisciplinary |
| 研究领域[WOS] | Physics |
| 关键词[WOS] | ACTIVE GALACTIC NUCLEI ; SPECTRAL ENERGY-DISTRIBUTIONS ; XMM-NEWTON ; AGN-I ; CATALOG ; ROSAT ; ULTRAVIOLET ; CAIXA ; BUMP |
| 收录类别 | SCI |
| 原文出处 | http://link.springer.com/article/10.1007%2Fs11433-010-0033-1 |
| 语种 | 英语 |
| WOS记录号 | WOS:000280291800023 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/5003]  |
| 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.National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Science, Kunming, 650011, China 2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming, 650011, China 3.Graduate University of Chinese Academy of Sciences, Beijing, 100049, China |
| 推荐引用方式 GB/T 7714 | Liu JY,Qiao EL. A statistical study of the relation between soft X-ray excess and accretion disk[J]. SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,2010,53(Supplement 1):102-105. |
| APA | Liu JY,&Qiao EL.(2010).A statistical study of the relation between soft X-ray excess and accretion disk.SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,53(Supplement 1),102-105. |
| MLA | Liu JY,et al."A statistical study of the relation between soft X-ray excess and accretion disk".SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY 53.Supplement 1(2010):102-105. |
入库方式： OAI收割
来源：云南天文台
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