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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; Dou, LM
发表期刊ASTROPHYSICAL JOURNAL
2016-03-10
卷号819期号:2
DOI10.3847/0004-637X/819/2/167
产权排序第5完成单位
收录类别SCI
关键词Galaxies: Active Galaxies: Individual (Was 61) Galaxies: Seyfert X-rays: Galaxies
摘要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.
项目资助者ESA Member States ; United States (NASA) ; Chinese Academy of Sciences(XDB09000000) ; National Basic Research Program of China(2015CB857005) ; NSFC(NSFC-11103071, NSFC-11233002, NSFC-11421303)
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN0004-637X
URL查看原文
WOS记录号WOS:000372305700079
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]ACTIVE 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
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文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/9356
专题丽江天文观测站(南方基地)
中国科学院天体结构与演化重点实验室
通讯作者Dou, LM
作者单位1.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
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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.,...&Dou, LM.(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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