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A modified stratified model for the 3C 273 jet
文献类型：期刊论文
| 作者 | Liu, Wen-Po1,2; Shen, Zhi-Qiang1 |
| 刊名 | RESEARCH IN ASTRONOMY AND ASTROPHYSICS
 |
| 出版日期 | 2009-05-01 |
| 卷号 | 9期号:5页码:520-528 |
| 关键词 | galaxies: active galaxies: individual (3C 273) galaxies: jets radiation mechanisms: non-thermal |
| 英文摘要 | We present a modified stratified jet model to interpret the observed spectral energy distributions of knots in the 3C 273 jet. Based on the hypothesis of the single index of the particle energy spectrum at injection and identical emission processes among 0 the knots, the observed difference of spectral shape among different 3C 273 knots can be understood as a manifestation of the deviation of the equivalent Doppler factor of stratified emission regions in an individual knot from a characteristic one. The summed spectral energy distributions of all ten knots in the 3C 273 jet can be well fitted by two components: a low-energy component (radio to optical) dominated by synchrotron radiation and a high-energy component (UV, X-ray and gamma-ray) dominated by inverse Compton scattering of the cosmic microwave background. This gives a consistent spectral index of alpha = 0.88 (S(v) proportional to v(-alpha)) and a characteristic Doppler factor of 7.4. Assuming the average of the summed spectrum as the characteristic spectrum of each knot in the 3C 273 jet, we further get a distribution of Doppler factors. We discuss the possible implications of these results for the physical properties in the 3C 273 jet. Future GeV observations with GLAST could separate the gamma-ray emission of 3C 273 from the large scale jet and the small scale jet (i.e. the core) through measuring the GeV spectrum. |
| 学科主题 | 星系与宇宙学研究中心 |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | SPACE-TELESCOPE ; SYNCHROTRON RADIATION ; M87 JET ; 3C-273 ; VARIABILITY ; DIAGNOSTICS ; EMISSION ; 3C273 ; LIGHT |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000266398200003 |
| 公开日期 | 2010-11-08 |
| 源URL | [http://119.78.226.72//handle/331011/12361]  |
| 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.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Wen-Po,Shen, Zhi-Qiang. A modified stratified model for the 3C 273 jet[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2009,9(5):520-528. |
| APA | Liu, Wen-Po,&Shen, Zhi-Qiang.(2009).A modified stratified model for the 3C 273 jet.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,9(5),520-528. |
| MLA | Liu, Wen-Po,et al."A modified stratified model for the 3C 273 jet".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 9.5(2009):520-528. |
入库方式： OAI收割
来源：上海天文台
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