Numerical Simulations of Winds Driven by Radiation Force from the Corona above a Thin Disk
文献类型：期刊论文
| 作者 | Yang, Xiao-Hong1; Bu, De-Fu2; Li, Qi-Xiu1 |
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2018-11-10 |
| 卷号 | 867期号:2 |
| 关键词 | Accretion, Accretion Disks Black Hole Physics Hydrodynamics Methods: Numerical |
| ISSN号 | 0004-637X |
| DOI | 10.3847/1538-4357/aae4e2 |
| 英文摘要 | Observations show that winds can be driven from the innermost region (inside a 50 Schwarschild radius) of a thin disk. It is interesting to study the winds launched from the innermost region. A hot corona above the black hole (BH) thin disk is irradiated by the disk. We perform two-dimensional hydrodynamical simulations to study the winds driven by radiation force from the corona in the innermost regions. The hard X-ray spectrum from active galactic nuclei (AGNs) suggests that the corona temperature is about 10(9) K, so that we mainly analyze the properties of winds (or outflows) from the 10(9) K corona. The disk luminosity plays an important role in driving the outflows. The more luminous the disk, the stronger the outflows. Mass outflow rate (M-out) at a 90 Schwarschild radius depends on disk luminosity, which can be described as M-out proportional to 10 G(3.3 Gamma) (Gamma is the ratio of the disk luminosity to the Eddington luminosity). In the case of high luminosity (e. g., Gamma = 0.75), the supersonic outflows with maximum speed 1.0 x 10(4) Km s(-1) are launched at similar to 17 degrees-30 degrees and similar to 50 degrees-80 degrees away from the pole axis. The Bernoulli parameter keeps increasing with the outward propagation of outflows. The radiation force keeps accelerating the outflows when outflows move outward. Therefore, we can expect the outflows to escape from the BH gravity and go to the galactic scale. The interaction between outflows and interstellar medium may be an important AGN feedback process. |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000449365600004 |
| 出版者 | IOP PUBLISHING LTD |
| 源URL | [http://119.78.226.72/handle/331011/32185]  |
| 专题 | 中国科学院上海天文台 |
| 通讯作者 | Yang, Xiao-Hong |
| 作者单位 | 1.Chongqing Univ, Dept Phys, Chongqing 400044, Peoples R China 2.Chinese Acad Sci, Shanghai Astron Observ, 80 Nandan Rd, Shanghai 200030, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yang, Xiao-Hong,Bu, De-Fu,Li, Qi-Xiu. Numerical Simulations of Winds Driven by Radiation Force from the Corona above a Thin Disk[J]. ASTROPHYSICAL JOURNAL,2018,867(2). |
| APA | Yang, Xiao-Hong,Bu, De-Fu,&Li, Qi-Xiu.(2018).Numerical Simulations of Winds Driven by Radiation Force from the Corona above a Thin Disk.ASTROPHYSICAL JOURNAL,867(2). |
| MLA | Yang, Xiao-Hong,et al."Numerical Simulations of Winds Driven by Radiation Force from the Corona above a Thin Disk".ASTROPHYSICAL JOURNAL 867.2(2018). |
入库方式： OAI收割
来源：上海天文台
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