Evidence for microarcsecond structure in the BL Lacertae object AO 0235+164
文献类型：期刊论文
| 作者 | Peng, B ; de Bruyn, AG
|
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2004-07-20 |
| 卷号 | 610期号:1页码:151-155 |
| 关键词 | BL Lacertae objects : individual ( AO 0235+164) galaxies : active galaxies : ISM radio continuum : galaxies |
| 英文摘要 | We have been investigating short timescale variability phenomena in some blazars with the Westerbork Synthesis Radio Telescope (WSRT). Low-modulation intrahour variability is detected at 6 cm in the BL Lac object AO 0235+164. If such a variation were intrinsic to the source, it would imply an apparent brightness temperature of similar to10(19) K in the source comoving frame, requiring a Doppler factor of similar to364 to reconcile it with the 10(12) K inverse Compton limit. A gravitational microlensing origin seems unlikely. We conclude that the variations are best explained by interstellar scintillation and show that the source must be larger than 15 muas. This implies an apparent brightness temperature lower than 10(13) K and can be interpreted by a relativistic component moving with a Doppler factor smaller than 38. With the scintillation model we estimate that the scattering occurs in material at less than 60 pc from the Earth. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000222699700015 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/6942]  |
| 专题 | 国家天文台_射电天文研究部 |
| 作者单位 | 1.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China 2.Kapteyn Astron Inst, NL-9700 AV Groningen, Netherlands 3.ASTRON, NL-7990 AA Dwingeloo, Netherlands |
| 推荐引用方式 GB/T 7714 | Peng, B,de Bruyn, AG. Evidence for microarcsecond structure in the BL Lacertae object AO 0235+164[J]. ASTROPHYSICAL JOURNAL,2004,610(1):151-155. |
| APA | Peng, B,&de Bruyn, AG.(2004).Evidence for microarcsecond structure in the BL Lacertae object AO 0235+164.ASTROPHYSICAL JOURNAL,610(1),151-155. |
| MLA | Peng, B,et al."Evidence for microarcsecond structure in the BL Lacertae object AO 0235+164".ASTROPHYSICAL JOURNAL 610.1(2004):151-155. |
入库方式： OAI收割
来源：国家天文台
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