Two-temperature coronal flow above a thin disk
文献类型：期刊论文
| 作者 | Liu BF(刘碧芳)1,2 ; Mineshige, S2; Meyer, F3; Meyer-Hofmeister, E3; Kawaguchi, T4
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| 刊名 | ASTROPHYSICAL JOURNAL
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| 出版日期 | 2002-08-10 |
| 卷号 | 575期号:1页码:117-126 |
| 关键词 | accretion, accretion disks galaxies : nuclei X-rays : binaries X-rays : galaxies |
| ISSN号 | 0004-637X |
| 产权排序 | 第一完成单位 |
| 通讯作者 | Liu, BF (reprint author), Kyoto Univ, Yukawa Inst Theoret Phys, Kyoto 6068502, Japan. |
| 英文摘要 | We extended the disk corona model to the inner region of galactic nuclei by including different temperatures in ions and electrons as well as Compton cooling. We found that the mass evaporation rate, and hence the fraction of accretion energy released in the corona, depend strongly on the rate of incoming mass flow from the outer edge of the disk, a larger rate leading to more Compton cooling, less efficient evaporation, and a weaker corona. We also found a strong dependence on the viscosity, with higher viscosity leading to an enhanced mass flow in the corona and therefore more evaporation of gas from the disk below. If we take accretion rates in units of the Eddington rate, our results become independent of the mass of the central black hole. The model predicts weaker contributions to the hard X-rays for objects with higher accretion rate like narrow-line Seyfert 1 galaxies, in agreement with observations. For luminous active galactic nuclei, strong Compton cooling in the innermost corona is so efficient that a large amount of additional heating is required to maintain the corona above the thin disk. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 学科主题 | Astronomy & Astrophysics |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | ADVECTION-DOMINATED ACCRETION ; ACTIVE GALACTIC NUCLEI ; XMM-NEWTON OBSERVATION ; X-RAY REFLECTION ; BLACK-HOLE ; COLD MATTER ; SEYFERT-1 GALAXIES ; OPTICALLY THIN ; EVAPORATION ; BINARIES |
| 收录类别 | SCI |
| 原文出处 | http://iopscience.iop.org/0004-637X/575/1/117/ |
| 语种 | 英语 |
| WOS记录号 | WOS:000177270900012 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/4936]  |
| 专题 | 云南天文台_高能天体物理研究组 |
| 作者单位 | 1.Yunnan Observatory, Chinese Academy of Sciences, P.O. Box 110, Kunming 650011, China 2.Yukawa Institute for Theoretical Physics, Kyoto University, Kyoto 606-8502, Japan 3.Max-Planck-Institut für Astrophysik, Karl-Schwarzschild-Strasse 1, D-85740 Garching, Germany 4.Department of Astronomy, Faculty of Science, Kyoto University, Kyoto 606-8502, Japan |
| 推荐引用方式 GB/T 7714 | Liu BF,Mineshige, S,Meyer, F,et al. Two-temperature coronal flow above a thin disk[J]. ASTROPHYSICAL JOURNAL,2002,575(1):117-126. |
| APA | Liu BF,Mineshige, S,Meyer, F,Meyer-Hofmeister, E,&Kawaguchi, T.(2002).Two-temperature coronal flow above a thin disk.ASTROPHYSICAL JOURNAL,575(1),117-126. |
| MLA | Liu BF,et al."Two-temperature coronal flow above a thin disk".ASTROPHYSICAL JOURNAL 575.1(2002):117-126. |
入库方式： OAI收割
来源：云南天文台
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