A magnetic reconnection-heated corona in AGN and its spectra
文献类型：会议论文
| 作者 | Liu BF(刘碧芳); Mineshige, S; Ohsuga, K; Liu BF(刘碧芳)
|
| 出版日期 | 2006 |
| 会议名称 | 35th COSPAR Scientific Assembly |
| 会议日期 | 2004-07-18 |
| 会议地点 | Paris, FRANCE |
| 关键词 | accretion accretion disks galaxies : active galaxies : nuclei X-rays : galaxies |
| 卷号 | 38 |
| 期号 | 7 |
| 页码 | 1409-1412 |
| 通讯作者 | Liu, BF (reprint author), Chinese Acad Sci, Yunnan Astron Observ, POB 110, Kunming 650011, Peoples R China. |
| 英文摘要 | We investigate a corona coupled with an underlying disk through magnetic and radiation fields. By studying the interaction between the corona and disk, we determine the fraction of accretion energy dissipated in the corona for a given black-hole mass and accretion rate. This allows us to calculate the emergent spectra through Monte Carlo simulations. The spectra are then determined as functions of black-hole mass and accretion rate. We find two types of solutions corresponding to hard spectrum and soft spectrum. In the hard-spectrum solution, the accretion energy is dominantly dissipated in the corona. The hard X-ray spectral indices are the same for different accretion rate, i.e., alpha similar to 1.1. In the soft-spectrum solution, the accretion energy is mainly dissipated in the disk. The spectra are dominated by the disk radiation peaked in UV and soft X-rays. For low-luminosity systems (L <= 0.2L(Edd)), there exists only the solution of hard spectra; while for high-luminosity systems (L >= 0.8L(Edd)), there exist both solutions of hard and soft spectra. The hard spectra are close to the observed spectra in Seyfert galaxies and radio-quiet QSOs. (c) 2005 COSPAR. Published by Elsevier Ltd. All rights reserved. |
| 收录类别 | EI ; CPCI |
| 产权排序 | 第一完成单位 |
| 会议网址 | http://www.sciencedirect.com/science/article/pii/S0273117705004291 |
| 会议录 | ADVANCES IN SPACE RESEARCH-SERIES - GALACTIC AND EXTRAGALACTIC ASTROPHYSICS
 |
| 会议录出版者 | ELSEVIER SCIENCE LTD |
| 学科主题 | Engineering, Aerospace; Astronomy & Astrophysics; Geosciences, Multidisciplinary; Meteorology & Atmospheric Sciences |
| 会议录出版地 | THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD 0X5 1GB, OXON, ENGLAND |
| 语种 | 英语 |
| ISSN号 | 0273-1177 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/184]  |
| 专题 | 云南天文台_高能天体物理研究组 |
| 通讯作者 | Liu BF(刘碧芳) |
| 作者单位 | 中国科学院云南天文台 |
| 推荐引用方式 GB/T 7714 | Liu BF,Mineshige, S,Ohsuga, K,et al. A magnetic reconnection-heated corona in AGN and its spectra[C]. 见:35th COSPAR Scientific Assembly. Paris, FRANCE. 2004-07-18.http://www.sciencedirect.com/science/article/pii/S0273117705004291. |
入库方式： OAI收割
来源：云南天文台
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