ELECTRON HEATING AND ACCELERATION BY MAGNETIC RECONNECTION IN HOT ACCRETION FLOWS
文献类型：期刊论文
| 作者 | Ding, Jian1; Yuan, Feng1 ; Liang, Edison2
|
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2010-01-10 |
| 卷号 | 708期号:2页码:1545-1550 |
| 关键词 | acceleration of particles accretion black hole physics magnetic fields accretion disks |
| 英文摘要 | Both analytical and numerical works show that magnetic reconnection must occur in hot accretion flows. This process will effectively heat and accelerate electrons. In this paper, we use the numerical hybrid simulation of magnetic reconnection plus the test-electron method to investigate the electron acceleration and heating due to magnetic reconnection in hot accretion flows. We consider fiducial values of density, temperature, and magnetic parameter beta(e) (defined as the ratio of the electron pressure to the magnetic pressure) of the accretion flow as n(0) similar to 10(6) cm(-3), T(e)(0) similar to 2 x 10(9) K, and beta(e) = 1. We find that electrons are heated to a higher temperature T(e) = 5 x 10(9) K, and a fraction eta similar to 8% of electrons are accelerated into a broken power-law distribution, dN(gamma) proportional to gamma(-p), with p approximate to 1.5 and 4 below and above similar to 1 MeV, respectively. We also investigate the effect of varying beta and n(0). We find that when beta(e) is smaller or n(0) is larger, i.e., the magnetic field is stronger, T(e), eta, and p all become larger. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | SAGITTARIUS-A-ASTERISK ; PARTICLE-ACCELERATION ; BLACK-HOLE ; GALACTIC-CENTER ; CURRENT SHEETS ; HYBRID CODE ; FIELD ; EMISSION ; MODEL ; FLARE |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000273021000049 |
| 公开日期 | 2011-06-29 |
| 源URL | [http://119.78.226.72//handle/331011/13379]  |
| 专题 | 上海天文台_星系宇宙学重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, Shanghai 200030, Peoples R China 2.Rice Univ, Dept Phys & Astron, Houston, TX 77005 USA |
| 推荐引用方式 GB/T 7714 | Ding, Jian,Yuan, Feng,Liang, Edison. ELECTRON HEATING AND ACCELERATION BY MAGNETIC RECONNECTION IN HOT ACCRETION FLOWS[J]. ASTROPHYSICAL JOURNAL,2010,708(2):1545-1550. |
| APA | Ding, Jian,Yuan, Feng,&Liang, Edison.(2010).ELECTRON HEATING AND ACCELERATION BY MAGNETIC RECONNECTION IN HOT ACCRETION FLOWS.ASTROPHYSICAL JOURNAL,708(2),1545-1550. |
| MLA | Ding, Jian,et al."ELECTRON HEATING AND ACCELERATION BY MAGNETIC RECONNECTION IN HOT ACCRETION FLOWS".ASTROPHYSICAL JOURNAL 708.2(2010):1545-1550. |
入库方式： OAI收割
来源：上海天文台
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