Multiepoch Spectroscopy of Mg ii Broad Absorption Line Transitions | |
Yi WM(易卫敏)1,2,3; Timlin, John2 | |
刊名 | ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES |
2021-07 | |
卷号 | 255期号:1 |
ISSN号 | 0067-0049 |
DOI | 10.3847/1538-4365/ac00b8 |
产权排序 | 第1完成单位 |
文献子类 | Article |
英文摘要 | Built upon a sample of 134 quasars that was dedicated to a systematic study of Mg II-BAL variability from Yi et al., we investigate these quasars, showing Mg II-BAL disappearance or emergence with the aid of at least three epoch optical spectra sampled more than 15 yr in the observed frame. We identified 3/3 quasars undergoing pristine/tentative BAL transformations. The incidence of pristine BAL transformations in the sample is therefore derived to be 2.2(-1.2)(+2.2)%, consistent with that of high-ionization BAL transformations from the literature. Adopting an average Mg II-BAL disappearance timescale of rest frame 6.89 yr among the six quasars, the average characteristic lifetime of Mg II BALs in the sample is constrained to be >160 yr along our line of sight. There is a diversity of BAL profile variability observed in the six quasars, probably reflecting a variety of mechanisms at work. Our investigations of Mg II-BAL transitions, combined with observational studies of BAL transitions from the literature, imply an overall FeLoBAL/LoBAL -> HiBAL/non-BAL transformation sequence, along with a decrease in reddening. This sequence is consistent with the evacuation models for the origin of commonly seen blue quasars, in which LoBAL quasars are in a short-lived blowout phase. |
学科主题 | 天文学 ; 星系与宇宙学 |
URL标识 | 查看原文 |
出版地 | TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND |
资助项目 | NSFNational Science Foundation (NSF)[AST-1516784] ; Chinese National Science Foundation (NSFC)National Natural Science Foundation of China (NSFC)[11703076] ; West Light Foundation of the Chinese Academy of SciencesChinese Academy of Sciences[Y6XB016001] ; China Scholarships Council[201604910001] ; NASA ADPNational Aeronautics & Space Administration (NASA)[80NSSC18K0878] ; Alfred P. Sloan FoundationAlfred P. Sloan Foundation ; National Science FoundationNational Science Foundation (NSF) ; U.S. Department of Energy Office of ScienceUnited States Department of Energy (DOE) ; University of Texas at Austin McDonald Observatory ; Department of Astronomy ; Pennsylvania State University ; Gemini Observatory by the Association of Universities for Research in Astronomy, Inc.[GN-2018B-FT-214] ; National Science Foundation (United States)National Science Foundation (NSF) ; National Research Council (Canada) ; CONICYT (Chile)Comision Nacional de Investigacion Cientifica y Tecnologica (CONICYT) ; Ministerio da Ciencia, Tecnologia e Inovaciao (Brazil) ; Ministerio de Ciencia, Tecnologia e Innovacion Productiva (Argentina) ; CASChinese Academy of Sciences ; People's Government of Yunnan Province ; China Manned Space Project[CMS-CSST-2021-A06] |
WOS关键词 | QUASAR OUTFLOW ; EMISSION ; DISAPPEARANCE ; VARIABILITY ; EMERGENCE ; DISCOVERY ; GALAXIES ; FEEDBACK ; SPECTRA ; CATALOG |
WOS研究方向 | Astronomy & Astrophysics |
语种 | 英语 |
出版者 | IOP PUBLISHING LTD |
WOS记录号 | WOS:000672076100001 |
资助机构 | NSFNational Science Foundation (NSF)[AST-1516784] ; Chinese National Science Foundation (NSFC)National Natural Science Foundation of China (NSFC)[11703076] ; West Light Foundation of the Chinese Academy of SciencesChinese Academy of Sciences[Y6XB016001] ; China Scholarships Council[201604910001] ; NASA ADPNational Aeronautics & Space Administration (NASA)[80NSSC18K0878] ; Alfred P. Sloan FoundationAlfred P. Sloan Foundation ; National Science FoundationNational Science Foundation (NSF) ; U.S. Department of Energy Office of ScienceUnited States Department of Energy (DOE) ; University of Texas at Austin McDonald Observatory ; Department of Astronomy ; Pennsylvania State University ; Gemini Observatory by the Association of Universities for Research in Astronomy, Inc.[GN-2018B-FT-214] ; National Science Foundation (United States)National Science Foundation (NSF) ; National Research Council (Canada) ; CONICYT (Chile)Comision Nacional de Investigacion Cientifica y Tecnologica (CONICYT) ; Ministerio da Ciencia, Tecnologia e Inovaciao (Brazil) ; Ministerio de Ciencia, Tecnologia e Innovacion Productiva (Argentina) ; CASChinese Academy of Sciences ; People's Government of Yunnan Province ; China Manned Space Project[CMS-CSST-2021-A06] |
内容类型 | 期刊论文 |
版本 | 出版稿 |
源URL | [http://ir.ynao.ac.cn/handle/114a53/24454] |
专题 | 云南天文台_丽江天文观测站(南方基地) |
通讯作者 | Yi WM(易卫敏) |
作者单位 | 1.Yunnan Observatories, Kunming, 650216, People's Republic of China; 2.Department of Astronomy & Astrophysics, The Pennsylvania State University, 525 Davey Lab, University Park, PA 16802, USA; 3.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650216, People's Republic of China |
推荐引用方式 GB/T 7714 | Yi WM,Timlin, John. Multiepoch Spectroscopy of Mg ii Broad Absorption Line Transitions[J]. ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,2021,255(1). |
APA | Yi WM,&Timlin, John.(2021).Multiepoch Spectroscopy of Mg ii Broad Absorption Line Transitions.ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,255(1). |
MLA | Yi WM,et al."Multiepoch Spectroscopy of Mg ii Broad Absorption Line Transitions".ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES 255.1(2021). |
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