IMAGES OF THE BL LACERTAE OBJECT 1749+701 AT 5 GHZ
文献类型：期刊论文
| 作者 | BAATH, LB; ZHANG, FJ |
| 刊名 | ASTRONOMY & ASTROPHYSICS
 |
| 出版日期 | 1992-08-01 |
| 卷号 | 262期号:1页码:1-7 |
| 关键词 | BL LACERTAE OBJECTS QUASARS RADIO CONTINUUM JETS |
| 英文摘要 | This paper presents images of 1749+701 from data obtained between 1980 and 1983 as a part of our VLBI programme to monitor a subsample of BL Lac objects at 5GHz. Our images show that this source has a complex structure with a jet pointing towards the north-west at a position angle of about -65-degrees. The brightest component is growing in extension along this position angle. We suggest this to be the core and that the growing extension was caused by a shock generated during an outburst and moving out along the jet. From the extension rate, we obtain an angular separation speed of 0.18 mas yr-1, which corresponds to an apparent transverse speed of 5c. The distances and position angles of two outer components seem remarkably constant. The phenomenon can be understood through a model in which a relativistic jet bends such that its axis is very close to the line of sight in two points. We also deduce that the Lorentz factor must be 4.5 less-than-or-equal-to gamma less-than-or-equal-to 6.5 and that the viewing angle must be 5-degrees less-than-or-equal-to theta less-than-or-equal-to 10-degrees. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | SPECTRUM RADIO-SOURCES ; COMPACT NONTHERMAL SOURCES ; ACTIVE GALACTIC NUCLEI ; COMPLETE SAMPLE ; SUPERLUMINAL MOTION ; FINE-STRUCTURE ; S5 SURVEY ; POLARIZATION ; PHYSICS ; MODELS |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:A1992JK48200006 |
| 源URL | [http://119.78.226.72/handle/331011/19316]  |
| 专题 | 上海天文台_VLBI研究室 |
| 作者单位 | CHINESE ACAD SCI, SHANGHAI OBSERV, SHANGHAI, PEOPLES R CHINA |
| 推荐引用方式 GB/T 7714 | BAATH, LB,ZHANG, FJ. IMAGES OF THE BL LACERTAE OBJECT 1749+701 AT 5 GHZ[J]. ASTRONOMY & ASTROPHYSICS,1992,262(1):1-7. |
| APA | BAATH, LB,&ZHANG, FJ.(1992).IMAGES OF THE BL LACERTAE OBJECT 1749+701 AT 5 GHZ.ASTRONOMY & ASTROPHYSICS,262(1),1-7. |
| MLA | BAATH, LB,et al."IMAGES OF THE BL LACERTAE OBJECT 1749+701 AT 5 GHZ".ASTRONOMY & ASTROPHYSICS 262.1(1992):1-7. |
入库方式： OAI收割
来源：上海天文台
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