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X-RAY SPECTRAL AND TEMPORAL ANALYSIS OF NARROW LINE SEYFERT 1 GALAXY WAS 61
Dou, Liming1; Wang, Ting-Gui1; Ai, Yanli2; Yuan, Weimin3; Zhou, Hongyan1,4; Dong XB(董小波)1,5,6
Source PublicationASTROPHYSICAL JOURNAL
2016-03-10
Volume819Issue:2
DOI10.3847/0004-637X/819/2/167
Contribution Rank第5完成单位
Indexed BySCI
KeywordGalaxies: Active Galaxies: Individual (Was 61) Galaxies: Seyfert X-rays: Galaxies
Abstract

We present an analysis of spectrum and variability of the bright reddened narrow line Seyfert 1 galaxy Was. 61 using 90 ks archival XMM-Newton data. The X-ray spectrum in 0.2-10 keV can be characterized by an absorbed power-law plus soft excess and an Fe. K alpha emission line. The power-law spectral index remains constant during the flux variation. The absorbing material is mildly ionized, with a column density of 3.2 x 10(21) cm(-2), and does not appear to vary during the period of the X-ray observation. If the same material causes the optical reddening (E(B-V) similar or equal to 0.6 mag), it must be located. outside the narrow line region with a dust-to-gas ratio similar to the average Galactic value. We detect significant variations of the Fe. K alpha line during the observational period. A broad Fe. Ka line at. 6.7 keV with a width of similar to 0.6 keV is detected in the low flux segment of the first 40 ks exposure, and is absent in the spectra of other segments; a narrow Fe. K alpha emission line similar to 6.4 keV with a width of similar to 0.1 keV is observed in the subsequent 20 ks segment, which has a count rate 35% higher and is in the next day. We believe this is due to the change in geometry and kinematics of the X-ray emitting corona. The temperature and flux of soft X-ray excess appear to correlate with the flux of the hard power-law component. Comptonization of disc photons by a warm and optically thick inner disk is preferred to interpret the soft excess, rather than the ionized reflection.

Funding ProjectESA Member States ; United States (NASA) ; Chinese Academy of Sciences[XDB09000000] ; National Basic Research Program of China[2015CB857005] ; NSFC[NSFC-11103071] ; NSFC[NSFC-11233002] ; NSFC[NSFC-11421303]
Funding OrganizationESA Member States ; United States (NASA) ; Chinese Academy of Sciences[XDB09000000] ; National Basic Research Program of China[2015CB857005] ; NSFC[NSFC-11103071, NSFC-11233002, NSFC-11421303]
Language英语
Subject Area天文学 ; 星系与宇宙学
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeArticle
PublisherIOP PUBLISHING LTD
Publication PlaceTEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
ISSN0004-637X
URL查看原文
WOS IDWOS:000372305700079
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordACTIVE GALACTIC NUCLEI ; SUPERMASSIVE BLACK-HOLES ; BROAD IRON LINES ; DUSTY WARM ABSORBER ; K-ALPHA LINE ; XMM-NEWTON ; ACCRETION-DISK ; REVERBERATION LAG ; COMPLETE SAMPLE ; CYGNUS X-1
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/9356
Collection丽江天文观测站(南方基地)
中国科学院天体结构与演化重点实验室
Corresponding AuthorDou, Liming; Wang, Ting-Gui
Affiliation1.Key Laboratory for Research in Galaxies and Cosmology, Department of Astronomy, The University of Sciences and Technology of China, Hefei, Anhui 230026, China
2.School of Physics and Astronomy, Sun Yat-Sen University, Guangzhou 510275, China
3.National Astronomical Observatories, Space Science Division, Chinese Academy of Sciences, Beijing 100012, China
4.Polar Research Institute of China, Jinqiao Road 451, Shanghai 200136, China
5.Yunnan Astronomical Observatories, Chinese Academy of Sciences, Kunming, Yunnan 650011, China
6.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming, Yunnan 650011, China
Recommended Citation
GB/T 7714
Dou, Liming,Wang, Ting-Gui,Ai, Yanli,et al. X-RAY SPECTRAL AND TEMPORAL ANALYSIS OF NARROW LINE SEYFERT 1 GALAXY WAS 61[J]. ASTROPHYSICAL JOURNAL,2016,819(2).
APA Dou, Liming,Wang, Ting-Gui,Ai, Yanli,Yuan, Weimin,Zhou, Hongyan,&Dong XB.(2016).X-RAY SPECTRAL AND TEMPORAL ANALYSIS OF NARROW LINE SEYFERT 1 GALAXY WAS 61.ASTROPHYSICAL JOURNAL,819(2).
MLA Dou, Liming,et al."X-RAY SPECTRAL AND TEMPORAL ANALYSIS OF NARROW LINE SEYFERT 1 GALAXY WAS 61".ASTROPHYSICAL JOURNAL 819.2(2016).
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