AGN STORM 2. I. First results: A Change in the Weather of Mrk 817 | |
Kara,Erin5; Mehdipour,Missagh6; Kriss,Gerard A.6; Cackett,Edward M.7; Arav,Nahum8; Barth,Aaron J.9; Byun,Doyee8; Brotherton,Michael S.10; De Rosa,Gisella6; Gelbord,Jonathan11 | |
刊名 | The Astrophysical Journal |
2021-12 | |
卷号 | 922期号:2 |
ISSN号 | 0004-637X |
DOI | 10.3847/1538-4357/ac2159 |
产权排序 | 第15完成单位 |
文献子类 | Article |
英文摘要 | Abstract We present the first results from the ongoing, intensive, multiwavelength monitoring program of the luminous Seyfert 1 galaxy Mrk 817. While this active galactic nucleus was, in part, selected for its historically unobscured nature, we discovered that the X-ray spectrum is highly absorbed, and there are new blueshifted, broad, and narrow UV absorption lines, which suggest that a dust-free, ionized obscurer located at the inner broad-line region partially covers the central source. Despite the obscuration, we measure UV and optical continuum reverberation lags consistent with a centrally illuminated Shakura–Sunyaev thin accretion disk, and measure reverberation lags associated with the optical broad-line region, as expected. However, in the first 55 days of the campaign, when the obscuration was becoming most extreme, we observe a de-coupling of the UV continuum and the UV broad emission-line variability. The correlation recovered in the next 42 days of the campaign, as Mrk 817 entered a less obscured state. The short C iv and Lyα lags suggest that the accretion disk extends beyond the UV broad-line region. |
学科主题 | 天文学 ; 天体物理学 ; 高能天体物理学 ; 星系与宇宙学 |
URL标识 | 查看原文 |
出版地 | TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND |
WOS关键词 | ACTIVE GALACTIC NUCLEIBROAD-LINE REGIONSUPERMASSIVE BLACK-HOLESX-RAY REVERBERATIONDRIVEN DISK WINDSSPACE TELESCOPEACCRETION-DISKEMISSION-LINESNGC 5548LIGHT CURVES |
WOS研究方向 | Astronomy & Astrophysics |
语种 | 英语 |
出版者 | IOP PUBLISHING LTD |
WOS记录号 | WOS:000722730500001 |
内容类型 | 期刊论文 |
源URL | [http://ir.ynao.ac.cn/handle/114a53/24746] |
专题 | 云南天文台_丽江天文观测站(南方基地) |
通讯作者 | Kara,Erin |
作者单位 | 1.Department of Astronomy, Faculty of Mathematics, University of Belgrade, Studentski trg 16,11000 Belgrade, Serbia 2.Kavli Institute for Astronomy and Astrophysics, Peking University, Beijing 100871, People's Republic of China 3.Department of Physics and Astronomy, York University, Toronto, ON M3J 1P3, Canada 4.Steward Observatory, University of Arizona, 933 North Cherry Avenue, Tucson, AZ 85721, USA 5.MIT Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA 6.Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA 7.Department of Physics and Astronomy, Wayne State University, 666 W. Hancock Street, Detroit, MI, 48201, USA 8.Department of Physics, Virginia Tech, Blacksburg, VA 24061, USA 9.Department of Physics and Astronomy, 4129 Frederick Reines Hall, University of California, Irvine, CA, 92697-4575, USA 10.Department of Physics and Astronomy, University of Wyoming, Laramie, WY 82071, USA |
推荐引用方式 GB/T 7714 | Kara,Erin,Mehdipour,Missagh,Kriss,Gerard A.,et al. AGN STORM 2. I. First results: A Change in the Weather of Mrk 817[J]. The Astrophysical Journal,2021,922(2). |
APA | Kara,Erin.,Mehdipour,Missagh.,Kriss,Gerard A..,Cackett,Edward M..,Arav,Nahum.,...&Zu,Ying.(2021).AGN STORM 2. I. First results: A Change in the Weather of Mrk 817.The Astrophysical Journal,922(2). |
MLA | Kara,Erin,et al."AGN STORM 2. I. First results: A Change in the Weather of Mrk 817".The Astrophysical Journal 922.2(2021). |
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