A Radio Changing-state Jet in the Narrow-line Seyfert 1 Galaxy J1105+1452
文献类型：期刊论文
| 作者 | Dou, Liming1; Chen, Zhining1; Wu, Jiahua1; Jiang, Ning2; Shu, Xinwen3; Wang, Tinggui2; Li, Xiaofeng4; Wang, Gege5; Ai, Yanli6; Chen, Mengzhu7 |
| 刊名 | ASTROPHYSICAL JOURNAL LETTERS
 |
| 出版日期 | 2026-05-01 |
| 卷号 | 1002期号:1 |
| ISSN号 | 2041-8205 |
| DOI | 10.3847/2041-8213/ae5e54 |
| 产权排序 | 第8完成单位 |
| 文献子类 | Article |
| 英文摘要 | We report the discovery of a radio-quiet to radio-loud transition in the narrow-line Seyfert 1 galaxy J1105+1452. The source has undergone a long-term evolution from a radio-quiet state in the 1990s to a persistently radio-bright state after 2017. Post-2017 flux densities in the 0.8-7 GHz range cluster between 32 and 43 mJy, whereas the 144 MHz flux density is only 1.94 +/- 0.23 mJy. This indicates strong low-frequency suppression from a compact, absorbed component. Modeling the radio spectral energy distribution with a synchrotron self-absorption model yields a turnover frequency nu p = 0.48 +/- 0.03 GHz and a peak flux density Sp = 38.9 +/- 4.7 mJy. These parameters classify J1105+1452 as a megahertz peaked-spectrum source, consistent with the new episode of an early-stage compact jet. Under the assumption of equipartition, we derive an intrinsic physical radius R similar to 0.68 pc and an average apparent expansion velocity beta app approximate to 0.64. The observed brightness temperature Tb approximate to 6.0 & times; 1011 K necessitates a Doppler factor delta approximate to 12, implying a relativistic jet viewed at theta less than or similar to 5 degrees. Despite the dramatic radio evolution, the X-ray spectrum remains stable and steep (Gamma similar or equal to 3.0), suggesting that the X-ray emission remains dominated by the disk/corona, while the radio band has become jet dominated. Our results identify J1105+1452 as a rare radio changing-state NLSy1, providing a unique laboratory for studying the birth and early evolution of relativistic jets at high Eddington ratios. |
| 学科主题 | 天文学 ; 星系与宇宙学 |
| URL标识 | 查看原文 |
| 出版地 | No.2 The Distillery, Glassfields, Avon Street, Bristol, ENGLAND |
| WOS关键词 | SUPERMASSIVE BLACK-HOLES ; SKY SURVEY ; VARIABILITY ; RAYS ; COEVOLUTION ; 1ST |
| 资助项目 | MOST divided by National Natural Science Foundation of China (NSFC)[12573110]; MOST divided by NSFC divided by Joint Fund of Astronomy[U1731104] |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001751323800001 |
| 出版者 | IOP Publishing Ltd |
| 资助机构 | MOST divided by National Natural Science Foundation of China (NSFC)[12573110] ; MOST divided by NSFC divided by Joint Fund of Astronomy[U1731104] |
| 版本 | 出版稿 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/29189]  |
| 专题 | 云南天文台_丽江天文观测站（南方基地） |
| 通讯作者 | Dou, Liming |
| 作者单位 | 1.Department of Astronomy, Guangzhou University, Guangzhou 510006, People’s Republic of China; doulm@gzhu.edu.cn; 2.Department of Astronomy, University of Science and Technology of China, Hefei, 230026, People’s Republic of China; 3.Department of Physics, Anhui Normal University, Wuhu, Anhui 241002, People’s Republic of China; 4.School of Computer Science and Information Engineering, Changzhou Institute of Technology, Changzhou, Jiangsu 213032, People’s Republic of China; 5.College of Physical Science and Technology, Shenyang Normal University, Shenyang 110034, People’s Republic of China; 6.College of Engineering Physics, Shenzhen Technology University, Shenzhen 518118, People’s Republic of China; aiyanli@sztu.edu.cn; 7.Department of Physics, Guangzhou University, Guangzhou 510006, People’s Republic of China; 8.Key Laboratory for the Structure and Evolution of Celestial Objects, Yunnan Observatories, Kunming 650011, People’s Republic of China |
| 推荐引用方式 GB/T 7714 | Dou, Liming,Chen, Zhining,Wu, Jiahua,et al. A Radio Changing-state Jet in the Narrow-line Seyfert 1 Galaxy J1105+1452[J]. ASTROPHYSICAL JOURNAL LETTERS,2026,1002(1). |
| APA | Dou, Liming.,Chen, Zhining.,Wu, Jiahua.,Jiang, Ning.,Shu, Xinwen.,...&Fan, Junhui.(2026).A Radio Changing-state Jet in the Narrow-line Seyfert 1 Galaxy J1105+1452.ASTROPHYSICAL JOURNAL LETTERS,1002(1). |
| MLA | Dou, Liming,et al."A Radio Changing-state Jet in the Narrow-line Seyfert 1 Galaxy J1105+1452".ASTROPHYSICAL JOURNAL LETTERS 1002.1(2026). |
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来源：云南天文台
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