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Testing colour-magnitude pattern as a method in the search for changing-look AGNs

文献类型：期刊论文

作者Zhu, Li-Tao6; Wang, Zhongxiang5,6; Devanand, P U4,7; Gupta, Alok C7; Dogra, Karan4,7; Li, Jie2,3; Zhang JJ(张居甲)1,8; Ji, Shun-Hao6; Sun, Si-Si6
刊名MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
出版日期2024-12-26
卷号536期号:3页码:2715-2729
关键词galaxies: active quasars: emission lines
ISSN号0035-8711
DOI10.1093/mnras/stae2774
产权排序第7完成单位
文献子类Article
英文摘要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.
学科主题天文学 ; 星系与宇宙学
URL标识查看原文
出版地GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
WOS关键词ACTIVE GALACTIC NUCLEI ; BLACK-HOLES ; SEYFERT 2 ; VARIABILITY ; TRANSITION ; DISCOVERY ; GALAXIES ; QUASARS ; I. ; CLASSIFICATION
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
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:001384913700001
出版者OXFORD UNIV PRESS
资助机构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
版本出版稿
源URL[http://ir.ynao.ac.cn/handle/114a53/27938]  
专题云南天文台_丽江天文观测站（南方基地）
云南天文台_中国科学院天体结构与演化重点实验室
作者单位1.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650216, China;
2.School of Astronomy and Space Science, University of Science and Technology of China, Hefei 230026, China;
3.Key Laboratory for Research in Galaxies and Cosmology, Department of Astronomy, University of Science and Technology of China, Hefei 230036, China;
4.Department of Applied Physics/Physics, Mahatma Jyotiba Phule Rohilkhand University, Bareilly 243006, India;
5.Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai 200030, China;
6.Department of Astronomy, School of Physics and Astronomy, Yunnan University, Kunming 650091, China;
7.Aryabhatta Research Institute of Observational Sciences (ARIES), Manora Peak, Nainital 263001, India;
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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