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Title: SUPERMASSIVE BLACK HOLES WITH HIGH ACCRETION RATES IN ACTIVE GALACTIC NUCLEI. III. DETECTION OF Fe ii REVERBERATION IN NINE NARROW-LINE SEYFERT 1 GALAXIES

Abstract

This is the third in a series of papers reporting on a large reverberation-mapping campaign aimed to study the properties of active galactic nuclei (AGNs) with high accretion rates. We present new results on the variability of the optical Fe ii emission lines in 10 AGNs observed by the Yunnan Observatory 2.4 m telescope from 2012 to 2013. We detect statistically significant time lags, relative to the AGN continuum, in nine of the sources. This accurate measurement is achieved using a sophisticated spectral fitting scheme that allows for apparent flux variations of the host galaxy, and several narrow lines, due to the changing observing conditions. Six of the newly detected lags are indistinguishable from the Hβ  lags measured in the same sources. Two are significantly longer and one is slightly shorter. Combining these findings with the Fe ii lags reported in previous studies, we find an Fe ii radius–luminosity relationship similar to the one for Hβ, although our sample by itself shows no clear correlation. The results support the idea that Fe ii emission lines originate in photoionized gas, which, for the majority of the newly reported objects, is indistinguishable from the Hβ-emitting gas. We also present a tentative correlation between the lag andmore » intensity of Fe ii and Hβ  and comment on its possible origin.« less

Authors:
; ; ; ; ;  [1]; ;  [2]; ;  [3];  [4];
  1. Key Laboratory for Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, 19B Yuquan Road, Beijing 100049 (China)
  2. Yunnan Observatories, Chinese Academy of Sciences, Kunming 650011 (China)
  3. School of Physics and Astronomy and the Wise Observatory, Tel-Aviv University, Tel-Aviv 69978 (Israel)
  4. Kavli Institute for Astronomy and Astrophysics, Peking University, Beijing 100871 (China)
Publication Date:
OSTI Identifier:
22522428
Resource Type:
Journal Article
Journal Name:
Astrophysical Journal
Additional Journal Information:
Journal Volume: 804; Journal Issue: 2; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0004-637X
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; BLACK HOLES; CORRELATIONS; DATA ANALYSIS; GALAXIES; GALAXY NUCLEI; HYDROGEN; IRON; LUMINOSITY; MAPPING; PHOTOIONIZATION; QUASARS; STAR ACCRETION; TELESCOPES; VARIATIONS

Citation Formats

Hu, Chen, Du, Pu, Lu, Kai-Xing, Li, Yan-Rong, Qiu, Jie, Wang, Jian-Min, Wang, Fang, Bai, Jin-Ming, Kaspi, Shai, Netzer, Hagai, Ho, Luis C., E-mail: wangjm@ihep.ac.cn, and Collaboration: SEAMBH Collaboration. SUPERMASSIVE BLACK HOLES WITH HIGH ACCRETION RATES IN ACTIVE GALACTIC NUCLEI. III. DETECTION OF Fe ii REVERBERATION IN NINE NARROW-LINE SEYFERT 1 GALAXIES. United States: N. p., 2015. Web. doi:10.1088/0004-637X/804/2/138.
Hu, Chen, Du, Pu, Lu, Kai-Xing, Li, Yan-Rong, Qiu, Jie, Wang, Jian-Min, Wang, Fang, Bai, Jin-Ming, Kaspi, Shai, Netzer, Hagai, Ho, Luis C., E-mail: wangjm@ihep.ac.cn, & Collaboration: SEAMBH Collaboration. SUPERMASSIVE BLACK HOLES WITH HIGH ACCRETION RATES IN ACTIVE GALACTIC NUCLEI. III. DETECTION OF Fe ii REVERBERATION IN NINE NARROW-LINE SEYFERT 1 GALAXIES. United States. doi:10.1088/0004-637X/804/2/138.
Hu, Chen, Du, Pu, Lu, Kai-Xing, Li, Yan-Rong, Qiu, Jie, Wang, Jian-Min, Wang, Fang, Bai, Jin-Ming, Kaspi, Shai, Netzer, Hagai, Ho, Luis C., E-mail: wangjm@ihep.ac.cn, and Collaboration: SEAMBH Collaboration. Sun . "SUPERMASSIVE BLACK HOLES WITH HIGH ACCRETION RATES IN ACTIVE GALACTIC NUCLEI. III. DETECTION OF Fe ii REVERBERATION IN NINE NARROW-LINE SEYFERT 1 GALAXIES". United States. doi:10.1088/0004-637X/804/2/138.
@article{osti_22522428,
title = {SUPERMASSIVE BLACK HOLES WITH HIGH ACCRETION RATES IN ACTIVE GALACTIC NUCLEI. III. DETECTION OF Fe ii REVERBERATION IN NINE NARROW-LINE SEYFERT 1 GALAXIES},
author = {Hu, Chen and Du, Pu and Lu, Kai-Xing and Li, Yan-Rong and Qiu, Jie and Wang, Jian-Min and Wang, Fang and Bai, Jin-Ming and Kaspi, Shai and Netzer, Hagai and Ho, Luis C., E-mail: wangjm@ihep.ac.cn and Collaboration: SEAMBH Collaboration},
abstractNote = {This is the third in a series of papers reporting on a large reverberation-mapping campaign aimed to study the properties of active galactic nuclei (AGNs) with high accretion rates. We present new results on the variability of the optical Fe ii emission lines in 10 AGNs observed by the Yunnan Observatory 2.4 m telescope from 2012 to 2013. We detect statistically significant time lags, relative to the AGN continuum, in nine of the sources. This accurate measurement is achieved using a sophisticated spectral fitting scheme that allows for apparent flux variations of the host galaxy, and several narrow lines, due to the changing observing conditions. Six of the newly detected lags are indistinguishable from the Hβ  lags measured in the same sources. Two are significantly longer and one is slightly shorter. Combining these findings with the Fe ii lags reported in previous studies, we find an Fe ii radius–luminosity relationship similar to the one for Hβ, although our sample by itself shows no clear correlation. The results support the idea that Fe ii emission lines originate in photoionized gas, which, for the majority of the newly reported objects, is indistinguishable from the Hβ-emitting gas. We also present a tentative correlation between the lag and intensity of Fe ii and Hβ  and comment on its possible origin.},
doi = {10.1088/0004-637X/804/2/138},
journal = {Astrophysical Journal},
issn = {0004-637X},
number = 2,
volume = 804,
place = {United States},
year = {2015},
month = {5}
}