| Testing colour-magnitude pattern as a method in the search for changing-look AGNs | |
Zhu, Li-Tao1; Wang, Zhongxiang1,2; Devanand, P U3,4; Gupta, Alok C3; Dogra, Karan3,4; Li, Jie5,6; Zhang JJ(张居甲)7,8 ; Ji, Shun-Hao1; Sun, Si-Si1
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| 发表期刊 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
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| 2024-12-26 | |
| 卷号 | 536期号:3页码:2715-2729 |
| DOI | 10.1093/mnras/stae2774 |
| 产权排序 | 第7完成单位 |
| 收录类别 | SCI ; EI |
| 关键词 | galaxies: active quasars: emission lines |
| 摘要 | We develop a simple method to search for changing-look (CL) active galactic nucleus (AGN) candidates, and conduct a test run. In this method, optical variations of AGNs are monitored and CL-AGNs may appear to have a pattern of being bluer when in brightening flare-like events. Applying this method, previously classified type 2 AGNs that show the bluer-when-brighter (BWB) pattern are selected. Among more than ten thousands type 2 AGNs classified in the Sloan Digital Sky Survey (SDSS), we find 73 candidates with possibly the strongest BWB pattern. We note that 13 of them have previously been reported as CL-AGNs. We have observed nine candidates, and found that five among them showed the CL transition from type 2 to type 1. In addition, we also test extending the selection to previously classified type 1 AGNs in the SDSS by finding sources with a possible redder-when-brighter pattern, but none of the three sources observed by us is found to show the transition from type 1 to type 2. We discuss the variation properties in both the success and failure cases, and plan to observe more candidates selected with the method. From the observational results, a detailed comparison between the CL-AGNs and none CL-AGNs will help quantitatively refine the selection criteria and in turn allow us to configure the general properties of CLAGNs. |
| 资助项目 | National Science Foundation[AST-2034437]; National Science Foundation; Weizmann Institute for Science; Oskar Klein Center at Stockholm University; University of Maryland, Deutsches Elektronen-Synchrotron; TANGO Consortium of Taiwan; Lawrence Livermore National Laboratories; IN2P3, France |
| 项目资助者 | National Science Foundation[AST-2034437] ; National Science Foundation ; Weizmann Institute for Science ; Oskar Klein Center at Stockholm University ; University of Maryland, Deutsches Elektronen-Synchrotron ; TANGO Consortium of Taiwan ; Lawrence Livermore National Laboratories ; IN2P3, France |
| 语种 | 英语 |
| 学科领域 | 天文学 ; 星系与宇宙学 |
| 文章类型 | Article |
| 出版者 | OXFORD UNIV PRESS |
| 出版地 | GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND |
| ISSN | 0035-8711 |
| URL | 查看原文 |
| WOS记录号 | WOS:001384913700001 |
| WOS研究方向 | Astronomy & Astrophysics |
| WOS类目 | Astronomy & Astrophysics |
| 关键词[WOS] | ACTIVE GALACTIC NUCLEI ; BLACK-HOLES ; SEYFERT 2 ; VARIABILITY ; TRANSITION ; DISCOVERY ; GALAXIES ; QUASARS ; I. ; CLASSIFICATION |
| EI入藏号 | 20250417741071 |
| EI主题词 | Active Galactic Nuclei |
| EI分类号 | 1302.1.2 - 1303 |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 版本 | 出版稿 |
| 条目标识符 | http://ir.ynao.ac.cn/handle/114a53/27938 |
| 专题 | 南方基地 中国科学院天体结构与演化重点实验室 |
| 作者单位 | 1.Department of Astronomy, School of Physics and Astronomy, Yunnan University, Kunming 650091, China; 2.Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai 200030, China; 3.Aryabhatta Research Institute of Observational Sciences (ARIES), Manora Peak, Nainital 263001, India; 4.Department of Applied Physics/Physics, Mahatma Jyotiba Phule Rohilkhand University, Bareilly 243006, India; 5.Key Laboratory for Research in Galaxies and Cosmology, Department of Astronomy, University of Science and Technology of China, Hefei 230036, China; 6.School of Astronomy and Space Science, University of Science and Technology of China, Hefei 230026, China; 7.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650216, China; 8.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650216, China |
| 推荐引用方式 GB/T 7714 | Zhu, Li-Tao,Wang, Zhongxiang,Devanand, P U,et al. Testing colour-magnitude pattern as a method in the search for changing-look AGNs[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2024,536(3):2715-2729. |
| APA | Zhu, Li-Tao.,Wang, Zhongxiang.,Devanand, P U.,Gupta, Alok C.,Dogra, Karan.,...&Sun, Si-Si.(2024).Testing colour-magnitude pattern as a method in the search for changing-look AGNs.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,536(3),2715-2729. |
| MLA | Zhu, Li-Tao,et al."Testing colour-magnitude pattern as a method in the search for changing-look AGNs".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 536.3(2024):2715-2729. |
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| Testing colour-magni（3511KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | 浏览 请求全文 | |
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