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2019 Hengxiao Guo

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, Xin Liu

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, Minzhi Kong, Shu Wang, Zhenfeng Sheng

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, Zhicheng He

Discovery of an Mg ii Changing-look Active Galactic Nucleus and Its Implications for a Unification Sequence of Changing-look Active Galactic Nuclei

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Meicun Hou

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, Xin Liu

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, Yue Shen

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, Paul J. Green

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Active Galactic Nucleus Pairs from the Sloan Digital Sky Survey. III. Chandra X-Ray Observations Unveil Obscured Double Nuclei

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Guo Hengxiao

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Discovery of A Mg II Changing-look AGN and its Implications for a Unification Sequence of Changing-look AGNs

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Xin Liu

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, Zhiyuan Li, Kristina Nyland, Minzhi Kong, Yue Shen

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, Joan M. Wrobel

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, Sijia Peng

A Trio of Massive Black Holes Caught in the Act of Merging

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Hengxiao Guo

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, Xin Liu, Zafar Tayyaba, Wei-Ting Liao

Spectral Energy Distributions of Candidate Periodically-Variable Quasars: Testing the Binary Black Hole Hypothesis

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Guo Hengxiao

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Understanding Broad Mg II Variability in Quasars with Photoionization

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Zhenfeng Sheng

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, Luming Sun, Zheng Cai

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, Chenwei Yang, Liming Dou

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Initial results from a systematic search for changing-look active galactic nuclei selected via mid-infrared variability

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This paper was not found in any repository, but could be made available legally by the author.

2018 Hengxiao Guo

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, Xin Liu

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, Yue Shen

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, Abraham Loeb, TalaWanda Monroe

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, Jason Xavier Prochaska

Constraining sub-parsec binary supermassive black holes in quasars with multi-epoch spectroscopy – III. Candidates from continued radial velocity tests

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Mouyuan Sun

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Evolution of Quasar Stochastic Variability along Its Main Sequence

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Xin Liu

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, Yue Shen

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, Jenny E. Greene, Michael A. Strauss

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Hubble Space Telescope Wide Field Camera 3 Identifies an r p = 1 Kpc Dual Active Galactic Nucleus in the Minor Galaxy Merger SDSS J0924+0510 at z = 0.1495

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Guo Hengxiao

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PyQSOFit: Python code to fit the spectrum of quasars

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Mouyuan Sun

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A Falling Corona Model for the Anomalous Behavior of the Broad Emission Lines in NGC 5548

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2017 Hengxiao Guo

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, Junxian Wang, Zhenyi Cai, Mouyuan Sun

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How Far Is Quasar UV/Optical Variability from a Damped Random Walk at Low Frequency?

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2016 Hengxiao Guo(郭恒潇)

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, Matthew A. Malkan, Minfeng Gu, Linlin Li, J. Xavier Prochaska

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, Jingzhe Ma, Bei You, Tayyaba Zafar

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, Mai Liao

The Optical Variability of Sdss Quasars From Multi-Epoch Spectroscopy. Iii. A Sudden Uv Cutoff in Quasar Sdss J2317+0005

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Hui Liu, Shuang-Liang Li, Minfeng Gu, Hengxiao Guo

An accretion disc-irradiation hybrid model for the optical/UV variability in radio-quiet quasars

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Hengxiao Guo (郭恒潇), Minfeng Gu

The Optical Variability of Sdss Quasars From Multi-Epoch Spectroscopy. Ii. Color Variation

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2014 Hengxiao Guo, Minfeng Gu

Spectral Variability of Quasar SDSS J030639.57 + 000343.1

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Hengxiao Guo, Minfeng Gu

The Optical Variability of Sdss Quasars From Multi-Epoch Spectroscopy. I. Results From 60 Quasars With ⩾ Six-Epoch Spectra

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