POLARIZED EMISSION OF SAGITTARIUS A
文献类型：期刊论文
| 作者 | Huang, Lei1,2,3 ; Liu, Siming4; Shen, Zhi-Qiang2; Yuan, Ye-Fei1; Cai, Mike J.3; Li, Hui5; Fryer, Christopher L.5,6
|
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2009-09-01 |
| 卷号 | 703期号:1页码:557-568 |
| 关键词 | black hole physics Galaxy: center plasmas polarization radiative transfer submillimeter |
| 英文摘要 | We explore the parameter space of the two-temperature pseudo-Newtonian Keplerian accretion flow model for the millimeter and shorter wavelength emission from Sagittarius A*. A general relativistic (GR) ray-tracing code is used to treat the radiative transfer of polarized synchrotron emission from the flow. The synchrotron self-Comptonization and bremsstrahlung emission components are also included. It is shown that the model can readily account for the millimeter to submillimeter emission characteristics with an accretion rate of similar to 6 x 10(17) g s(-1) and an inclination angle of similar to 40 degrees. However, the corresponding model-predicted near-infrared (NIR) and X-ray fluxes are more than one order of magnitude lower than the observed "quiescent" state values. While the extended quiescent-state X-ray emission has been attributed to thermal emission from the large-scale accretion flow, the NIR emission and flares are likely dominated by emission regions either within the last stable orbit of a Schwarzschild black hole or associated with outflows. With the viscous parameter derived from numerical simulations, there is still a degeneracy between the electron heating rate and the magnetic parameter. A fully GR treatment with the black hole spin incorporated will resolve these issues. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | SUPERMASSIVE BLACK-HOLE ; COVARIANT MAGNETOIONIC THEORY ; NEAR-INFRARED FLARES ; A-ASTERISK ; GALACTIC-CENTER ; CIRCULAR-POLARIZATION ; SUBMILLIMETER EMISSION ; SYNCHROTRON RADIATION ; LINEAR-POLARIZATION ; ACCRETION FLOW |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000269625000045 |
| 公开日期 | 2015-03-17 |
| 源URL | [http://119.78.226.72//handle/331011/15890]  |
| 专题 | 上海天文台_星系宇宙学重点实验室 |
| 作者单位 | 1.Univ Sci & Technol China, Key Lab Res Galaxies & Cosmol, Chinese Acad Sci, Hefei 230026, Peoples R China 2.Chinese Acad Sci, Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, Shanghai 200030, Peoples R China 3.Acad Sinica, Inst Astron & Astrophys, Taipei 106, Taiwan 4.Univ Glasgow, Dept Phys & Astron, Glasgow G12 8QQ, Lanark, Scotland 5.Los Alamos Natl Lab, Los Alamos, NM 87545 USA 6.Univ Arizona, Dept Phys, Tucson, AZ 85721 USA |
| 推荐引用方式 GB/T 7714 | Huang, Lei,Liu, Siming,Shen, Zhi-Qiang,et al. POLARIZED EMISSION OF SAGITTARIUS A[J]. ASTROPHYSICAL JOURNAL,2009,703(1):557-568. |
| APA | Huang, Lei.,Liu, Siming.,Shen, Zhi-Qiang.,Yuan, Ye-Fei.,Cai, Mike J..,...&Fryer, Christopher L..(2009).POLARIZED EMISSION OF SAGITTARIUS A.ASTROPHYSICAL JOURNAL,703(1),557-568. |
| MLA | Huang, Lei,et al."POLARIZED EMISSION OF SAGITTARIUS A".ASTROPHYSICAL JOURNAL 703.1(2009):557-568. |
入库方式： OAI收割
来源：上海天文台
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。