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An Extensive Study of Blazar Broad Emission Line: Changing-look Blazars and the Baldwin Effect
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Comparison of the active galactic nuclei Baldwin effect with the modified Baldwin effect of the ultraviolet-optical emission lines in a single sample
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The role of radio loudness in Eigenvector 1 and the Baldwin Effect of [O iii] λ5007
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More Variable Quasars Have Stronger Emission Lines
The CaFe Project: Optical Fe II and Near-infrared Ca II Triplet Emission in Active Galaxies. II. The Driver(s) of the Ca II and Fe II and Its Potential Use as a Chemical Clock
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Behaviour of the Mg ii 2798 Å line over the full range of AGN variability
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The first high-redshift changing-look quasars
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Understanding Broad Mg ii Variability in Quasars with Photoionization: Implications for Reverberation Mapping and Changing-look Quasars
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Time-delay Measurement of Mg ii Broad-line Response for the Highly Accreting Quasar HE 0413-4031: Implications for the Mg ii–based Radius–Luminosity Relation
Michal Zajaček, Bożena Czerny, Mary Loli Martinez–Aldama, Mateusz Rałowski, Aleksandra Olejak, Swayamtrupta Panda, Krzysztof Hryniewicz, Marzena Śniegowska, Mohammad-Hassan Naddaf, Wojtek Pych, Grzegorz Pietrzyński, C. Sobrino Figaredo, Martin Haas, Justyna Średzińska, Magdalena Krupa, Agnieszka Kurcz, Andrzej Udalski, Marek Gorski and Marek Sarna The Astrophysical Journal 896(2) 146 (2020) https://doi.org/10.3847/1538-4357/ab94ae
The nature of flux variations in the continua and broad-line regions of selected active galactic nuclei
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The Radius–Luminosity Relationship Depends on Optical Spectra in Active Galactic Nuclei