Sensitive Chandra coverage of a representative sample of weak-line quasars: revealing the full range of X-ray properties
文献类型:期刊论文
作者 | Ni, Q4,5,6; Brandt, W N4,5,7; Luo, B8,9; Garmire, G P10; Hall, P B11; Plotkin, R M12; Shemmer, O13; III, J D Timlin,4,5; Vito, F14; Wu, J1 |
刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY |
出版日期 | 2022-03-04 |
卷号 | 511期号:4页码:5251-5264 |
ISSN号 | 0035-8711 |
关键词 | galaxies: active galaxies: nuclei quasars: general X-rays: galaxies |
DOI | 10.1093/mnras/stac394 |
产权排序 | 第13完成单位 |
文献子类 | Article |
英文摘要 | We present deeper Chandra observations for weak-line quasars (WLQs) in a representative sample that previously had limited X-ray constraints, and perform X-ray photometric analyses to reveal the full range of X-ray properties of WLQs. Only 5 of the 32 WLQs included in this representative sample remain X-ray undetected after these observations, and a stacking analysis shows that these 5 have an average X-ray weakness factor of >85. One of the WLQs in the sample that was known to have extreme X-ray variability, SDSS J1539+3954, exhibited dramatic X-ray variability again: it changed from an X-ray normal state to an X-ray weak state within approximate to 3 months in the rest frame. This short time-scale for an X-ray flux variation by a factor of greater than or similar to 9 further supports the thick disc and outflow (TDO) model proposed to explain the X-ray and multiwavelength properties of WLQs. The overall distribution of the X-ray-to-optical properties of WLQs suggests that the TDO has an average covering factor of the X-ray emitting region of similar to 0.5, and the column density of the TDO can range from N-H similar to 10(23-24) cm(-2) to N-H greater than or similar to 10(24) cm(-2), which leads to different levels of absorption and Compton reflection (and/or scattering) among WLQs. |
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 ; CONFIDENCE-LIMITS ; EMISSION ; ULTRAVIOLET ; SPECTRA ; GALAXY ; VARIABILITY ; LUMINOSITY ; INSIGHTS ; CATALOG |
资助项目 | Chandra X-ray Center[GO0-21080X] ; Chandra X-ray Center[DDO-21113X] ; NASANational Aeronautics & Space Administration (NASA)[80NSSC20K0795] ; NASANational Aeronautics & Space Administration (NASA)[NAS8-03060] ; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC)[11991053] ; China Manned Space Project[CMS-CSST-2021-A05] ; China Manned Space Project[CMS-CSST-2021-A06] ; UKRI Future Leaders FellowshipUK Research & Innovation (UKRI)[MR/T020989/1] ; Huntingdon Institute[SV2-82024] ; Penn State ACIS Instrument Team by the Chandra X-ray Center[SV4-74018] |
WOS研究方向 | Astronomy & Astrophysics |
语种 | 英语 |
出版者 | OXFORD UNIV PRESS |
WOS记录号 | WOS:000764267000011 |
资助机构 | Chandra X-ray Center[GO0-21080X, DDO-21113X] ; NASANational Aeronautics & Space Administration (NASA)[80NSSC20K0795, NAS8-03060] ; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC)[11991053] ; China Manned Space Project[CMS-CSST-2021-A05, CMS-CSST-2021-A06] ; UKRI Future Leaders FellowshipUK Research & Innovation (UKRI)[MR/T020989/1] ; Huntingdon Institute[SV2-82024] ; Penn State ACIS Instrument Team by the Chandra X-ray Center[SV4-74018] |
版本 | 出版稿 |
源URL | [http://ir.ynao.ac.cn/handle/114a53/24970] |
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 |
通讯作者 | Ni, Q |
作者单位 | 1.Department of Astronomy, Xiamen University, Xiamen, Fujian 361005, China; 2.Yunnan Observatories, Kunming 650216, China; 3.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650216, China 4.Department of Astronomy and Astrophysics, The Pennsylvania State University, 525 Davey Lab, University Park, PA 16802, USA; 5.Institute for Gravitation and the Cosmos, The Pennsylvania State University, University Park, PA 16802, USA; 6.Institute for Astronomy, University of Edinburgh, Royal Observatory, Edinburgh EH9 3HJ, UK; 7.Department of Physics, The Pennsylvania State University, University Park, PA 16802, USA; 8.School of Astronomy and Space Science, Nanjing University, Nanjing, Jiangsu 210093, China; 9.Key Laboratory of Modern Astronomy and Astrophysics (Nanjing University), Ministry of Education, Nanjing, Jiangsu 210093, China; 10.Huntingdon Institute for X-ray Astronomy, LLC, 10677 Franks Road, Huntingdon, PA 16652, USA; |
推荐引用方式 GB/T 7714 | Ni, Q,Brandt, W N,Luo, B,et al. Sensitive Chandra coverage of a representative sample of weak-line quasars: revealing the full range of X-ray properties[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2022,511(4):5251-5264. |
APA | Ni, Q.,Brandt, W N.,Luo, B.,Garmire, G P.,Hall, P B.,...&Yi WM.(2022).Sensitive Chandra coverage of a representative sample of weak-line quasars: revealing the full range of X-ray properties.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,511(4),5251-5264. |
MLA | Ni, Q,et al."Sensitive Chandra coverage of a representative sample of weak-line quasars: revealing the full range of X-ray properties".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 511.4(2022):5251-5264. |
入库方式: OAI收割
来源:云南天文台
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