2022
DOI: 10.48550/arxiv.2208.02449
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The relation between quasars' optical spectra and variability

Abstract: Brightness variation is an essential feature of quasars, but its mechanism and relationship to other physical quantities are not understood well. We aimed to find the relationship between the optical variability and spectral features to reveal the regularity behind the random variation. It is known that quasar's FeII/Hβ flux ratio and equivalent width of [OIII]5007 are negatively correlated, called Eigenvector 1. In this work, we visualized the relationship between the position on this Eigenvector 1 (EV1) plan… Show more

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