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THE REDSHIFTED HYDROGEN BALMER AND METASTABLE He I ABSORPTION LINE SYSTEM IN MINI-FELOBAL QUASAR SDSS J112526.12+002901.3: A PARSEC-SCALE ACCRETION INFLOW?
Shi, Xi-Heng1,2; Jiang, Peng1; Wang, Hui-Yuan2; Zhang, Shao-Hua1; Ji, Tuo1; Liu WJ(刘文娟)3; Zhou, Hong-Yan1,2; Shi, XH
发表期刊ASTROPHYSICAL JOURNAL
2016-10-01
卷号829期号:2
DOI10.3847/0004-637X/829/2/96
产权排序第3完成单位
收录类别SCI
关键词Galaxies Active - Quasars Absorption Lines - Quasars Individual (Sdss j112526.12+002901.3)
摘要The accretion of the. interstellar medium onto. central super-massive black holes is widely accepted as the source of the gigantic energy released by the active galactic nuclei. However,. few pieces of observational evidence have been confirmed directly demonstrating the existence of the inflows. The absorption line system in the spectra of quasar SDSS J112526.12+002901.3 presents an interesting example. in which the rarely detected hydrogen Balmer and metastable He I absorption lines are found redshifted to the quasar's rest. frame along with the low-ionization metal absorption lines Mg II, Fe II, etc. The repeated SDSS spectroscopic observations suggest a transverse velocity smaller than the radial velocity. The motion of the absorbing medium is thus dominated by infall. The He I* lines present a powerful probe to the strength of ionizing flux, while the Balmer lines imply a dense environment. With the help of photoionization simulations, we find that the absorbing medium is exposed to the radiation with ionization parameter U approximate to 10(-1.8), and the density is n(H) approximate to 10(9) cm(-3). Thus the absorbing medium is located similar to 4 pc away from the central engine. According to the similarity in the distance and physical conditions between the absorbing medium and the torus, we strongly propose the absorption line system as a candidate for the accretion inflow, which originates in. the inner surface of the torus.
项目资助者National Basic Research Program of China (the 973 Program)(2013CB834905) ; National Natural Science Foundation of China(NSFC-11421303, 11473025) ; Strategic Priority Research Program The Emergence of Cosmological Structures(XDB09000000) ; National Astronomical Observatories ; Chinese Academy of Sciences ; Special Fund for Astronomy from the Ministry of Finance
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN0004-637X
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WOS记录号WOS:000385377200038
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]ACTIVE GALACTIC NUCLEI ; DIGITAL SKY SURVEY ; EMISSION-LINE ; EXTINCTION CURVES ; SEYFERT-GALAXIES ; STELLAR OBJECTS ; DUST EMISSION ; BLACK-HOLES ; HOT DUST ; BROAD
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文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/9742
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通讯作者Shi, XH
作者单位1.Polar Research Institute of China, Jinqiao Road 451, Shanghai 200136, China
2.Key Laboratory for Research in Galaxies and Cosmology, Department of Astronomy, University of Science and Technology of China, Chinese Academy of Sciences, Hefei, Anhui 230026, China
3.Yunnan Observatories, Chinese Academy of Sciences, Kunming, Yunnan 650011, China
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Shi, Xi-Heng,Jiang, Peng,Wang, Hui-Yuan,et al. THE REDSHIFTED HYDROGEN BALMER AND METASTABLE He I ABSORPTION LINE SYSTEM IN MINI-FELOBAL QUASAR SDSS J112526.12+002901.3: A PARSEC-SCALE ACCRETION INFLOW?[J]. ASTROPHYSICAL JOURNAL,2016,829(2).
APA Shi, Xi-Heng.,Jiang, Peng.,Wang, Hui-Yuan.,Zhang, Shao-Hua.,Ji, Tuo.,...&Shi, XH.(2016).THE REDSHIFTED HYDROGEN BALMER AND METASTABLE He I ABSORPTION LINE SYSTEM IN MINI-FELOBAL QUASAR SDSS J112526.12+002901.3: A PARSEC-SCALE ACCRETION INFLOW?.ASTROPHYSICAL JOURNAL,829(2).
MLA Shi, Xi-Heng,et al."THE REDSHIFTED HYDROGEN BALMER AND METASTABLE He I ABSORPTION LINE SYSTEM IN MINI-FELOBAL QUASAR SDSS J112526.12+002901.3: A PARSEC-SCALE ACCRETION INFLOW?".ASTROPHYSICAL JOURNAL 829.2(2016).
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文件名: The Redshifted Hydrogen Balmer and Metastable He 1 Absorption Line System in Mini-FeLoBAL Quasar SDSS J112526.12+002901.3_ A Parsec-scale Accretion Inflow.pdf
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