Resolving the inner jet of PKS 1749+096 with super-resolution VLBA images at 7 mm
文献类型：期刊论文
| 作者 | Cui, Lang5,6 ; Lu, Ru-Sen3,4,5; Yu, Wei4; Liu, Jun3; Patino-Alvarez, Victor M.2,3; Yuan, Qirong1,6
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| 刊名 | Research in Astronomy and Astrophysics
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| 出版日期 | 2021-05-01 |
| 卷号 | 21期号:4页码:91 |
| 关键词 | galaxies quasars individual PKS 1749+096 galaxies jets radio continuum galaxies gamma-ray emission parsec-scale jet lac objects resolution m87 base agn Astronomy & Astrophysics |
| ISSN号 | 1674-4527 |
| DOI | 10.1088/1674-4527/21/4/91 |
| 产权排序 | 1 |
| 文献子类 | Article |
| 英文摘要 | High resolution imaging of inner jets in Active Galactic Nuclei (AGNs) with Very Long Baseline Interferometry (VLBI) at millimeter wavelengths provides deep insight into the launching and collimation mechanisms of relativistic jets. The BL Lac object, PKS 1749+096, shows a core-dominated jet pointing toward the northeast on parsec-scales revealed by various VLBI observations. In order to investigate the jet kinematics, in particular, the orientation of the inner jet on the smallest accessible scales and the basic physical conditions of the core, in this work we adopted a super-resolution technique, the Bi-Spectrum Maximum Entropy Method (BSMEM), to reanalyze VLBI images based on the Very Long Baseline Array (VLBA) observations of PKS 1749+096within the VLBA-BU-BLAZAR 7mm monitoring program. These observations include a total of 105 epochs covering the period from 2009 to 2019. We found that the stacked image of the inner jet is limb-brightened with an apparent opening angle of 50 degrees 0 +/- 8 degrees 0 and 42 degrees 0 +/- 6 degrees 0 at the distances of 0.2 and 0.3 mas (0.9 and 1.4 pc) from the core, corresponding to an intrinsic jet opening angle of 5 degrees 2 +/- 1 degrees 0 and 4 degrees 3 +/- 0 degrees 7, respectively. In addition, our images show a clear jet position angle swing in \sr within the last ten years. We discuss the possible implications of jet limb brightening and the connection of the position angle with jet peak flux density and gamma-ray brightness. |
| URL标识 | 查看原文 |
| 语种 | 英语 |
| CSCD记录号 | CSCD:6959599 |
| WOS记录号 | WOS:000657382900001 |
| 源URL | [http://ir.xao.ac.cn/handle/45760611-7/4708]  |
| 专题 | 星系宇宙学研究团组 |
| 通讯作者 | Lu, Ru-Sen |
| 作者单位 | 1.University of Chinese Academy of Sciences, Beijing 100049, China 2.Instituto Nacional de Astrof´ısica, ´Optica y Electr´onica, Luis Enrique Erro # 1, Tonantzintla, Puebla 72840,M´exico; 3.Max Planck Institute for Radio Astronomy, Auf dem h¨ugel 69, Bonn 53121, Germany; 4.Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai 200030, China; 5.Key Laboratory of Radio Astronomy, Chinese Academy of Sciences, Nanjing 210008, China; 6.Xinjiang Astronomical Observatory, Chinese Academy of Sciences, Urumqi 830011, China; |
| 推荐引用方式 GB/T 7714 | Cui, Lang,Lu, Ru-Sen,Yu, Wei,et al. Resolving the inner jet of PKS 1749+096 with super-resolution VLBA images at 7 mm[J]. Research in Astronomy and Astrophysics,2021,21(4):91. |
| APA | Cui, Lang,Lu, Ru-Sen,Yu, Wei,Liu, Jun,Patino-Alvarez, Victor M.,&Yuan, Qirong.(2021).Resolving the inner jet of PKS 1749+096 with super-resolution VLBA images at 7 mm.Research in Astronomy and Astrophysics,21(4),91. |
| MLA | Cui, Lang,et al."Resolving the inner jet of PKS 1749+096 with super-resolution VLBA images at 7 mm".Research in Astronomy and Astrophysics 21.4(2021):91. |
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