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题名: Modelling warm absorption in HST/COS spectrum of Mrk 290 with XSTAR
作者: Zhang, S. N.1, 2, 3, 4; Ji Li(纪丽)1, 2, 3; Kallman, T. R.5; Yao, Y. S.6; Froning, C. S.7; Gu, Q. S.3, 4, 8; Kriss, G. A.9
刊名: MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
出版日期: 2015-03-01
卷号: 447, 期号:3, 页码:2671-2682
关键词: quasars: absorption lines ; quasars: individual: Mrk 290 ; ultraviolet: galaxies
学科分类: 天文和天体物理
DOI: 10.1093/mnras/stu2594
文章类型: Article
英文摘要: We present a new method to model an HST/COS (Hubble Space Telescope/Cosmic Origins Spectrograph) spectrum, aimed to analyse intrinsic UV absorption from the outflow of Mrk 290, a Seyfert I galaxy. We use newly updated XSTAR to generate photoionization models for the intrinsic absorption from the active galactic nuclei (AGN) outflow, the line emission from the AGN broad-and narrow-line regions, and the local absorption from high-velocity clouds and Galactic interstellar medium. The combination of these physical models accurately fits the COS spectrum. Three intrinsic absorbers outflowing with velocities similar to 500 km s(-1) are identified, two of which are found directly from two velocity components of the N V and C IV doublets, while the third is required by the extra absorption in the Ly alpha. Their outflow velocities, ionization states and column densities are consistent with the lowest and moderate ionization warm absorbers (WAs) in the X-ray domain found by Chandra observations, suggesting a one-to-one correspondence between the absorbing gas in the UV and X-ray bands. The small turbulent velocities of the WAs (v(turb) less than or similar to 100 km s(-1)) support our previous argument from the X-ray study that the absorbers originate from the inner side of the torus due to thermal evaporation. Given the covering fractions of similar to 65 per cent for the three WAs, we deduce that the lengths and the thicknesses of the WAs are comparable, which indicates that the geometry of WAs are more likely clouds rather than flat and thin layers. In addition, the modelling of the broad-line emission suggests a higher covering fraction of clouds when they are very closer to the black hole.
WOS标题词: Science & Technology ; Physical Sciences
类目[WOS]: Astronomy & Astrophysics
研究领域[WOS]: Astronomy & Astrophysics
关键词[WOS]: ACTIVE GALACTIC NUCLEI ; HUBBLE-SPACE-TELESCOPE ; SEYFERT 1 GALAXIES ; X-RAY-ABSORPTION ; INTRINSIC ABSORPTION ; IONIZED-GAS ; XMM-NEWTON ; MULTIWAVELENGTH CAMPAIGN ; SIMULTANEOUS CHANDRA ; PHYSICAL CONDITIONS
收录类别: SCI
所属项目名称: PMO_LIB-IR
语种: 英语
WOS记录号: WOS:000350273200046
Citation statistics:
内容类型: 期刊论文
URI标识: http://libir.pmo.ac.cn/handle/332002/14801
Appears in Collections:暗物质和空间天文实验室_期刊论文

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作者单位: 1.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China
2.Chinese Acad Sci, PMO, Key Lab Dark Matter & Space Astron, Nanjing 210008, Peoples R China
3.Collaborat Innovat Ctr Modern Astron & Space Expl, Nanjing 210093, Jiangsu, Peoples R China
4.Nanjing Univ, Key Lab Modern Astron & Astrophys, Nanjing 210093, Jiangsu, Peoples R China
5.NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA
6.Eureka Sci Inc, Oakland, CA 94602 USA
7.Univ Texas Austin, Dept Astron, Austin, TX 78712 USA
8.Nanjing Univ, Sch Astron & Space Sci, Nanjing 210008, Peoples R China
9.Space Telescope Sci Inst, Baltimore, MD 21218 USA
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